Popular New Calculator Checklist Community Guides Product Guides Live Cams My Pool

Results for "low flow"

469+ Answers 4 New This Week Free
Pool VideosSee all →
Can Pool Filter Pressure Be Too Low? Diagnosis & Solutions
Filters Medium 1-3 hours 552 👍

Can Pool Filter Pressure Be Too Low? Diagnosis & Solutions

Found out from my wife that our pool filter pressure gauge has been stuck at a weirdly low 6-7 PSI all week and now I can't stop obsessing over it. My 20,000 gallon inground pool has been running fine otherwise, but I'm wondering if this low pressure is something I should be concerned about.

I've heard people talk about high filter pressure being bad, but nobody ever mentions if pressure can be too low. The pump seems to be running, but I'm not sure if the water flow looks as strong as it used to be. Water chemistry has been balanced - chlorine at 2.5 ppm, pH at 7.4, and alkalinity at 110 ppm. Should I be worried about this low pressure reading, and what could be causing it?…more
Do Variable Speed Pool Pumps Run All The Time? Complete Guide
Equipment Medium 45 minutes 380 👍

Do Variable Speed Pool Pumps Run All The Time? Complete Guide

Apparently my pool guy wants $800 to install a variable speed pump that he claims runs 24/7, but I'm skeptical about whether that's really necessary. I'm particularly interested in understanding how they balance filtration requirements with energy efficiency, and whether the speed modulation eliminates the need for complete shutdown periods during normal operation.…more
Can Pool Algae Grow Without Sunlight? Indoor Pool Facts
Algae Green Pool Medium 45 minutes 345 👍

Can Pool Algae Grow Without Sunlight? Indoor Pool Facts

Starting to see algae in my 8-year-old indoor pool despite zero sunlight exposure — is this equipment failure or normal aging? My pool has been covered for months now with zero direct sunlight hitting it, but I'm still dealing with algae growth! I thought algae needed sunlight to survive, so this doesn't make any sense to me.

I've been throwing chemicals at this problem left and right, but the green keeps coming back. The pool is basically in complete darkness under the cover, yet somehow this stuff is thriving. Can algae actually grow without sunlight, or am I missing something obvious? I'm starting to think there's more to this than just blocking out the sun.…more
Do You Need a Pool Heater Bypass? Installation Guide
Heaters Medium 2-4 hours 612 👍

Do You Need a Pool Heater Bypass? Installation Guide

Before I connect my new pool heater to the system, it's making this weird whistling sound when water flows through and now I'm wondering if a bypass valve would fix it. The manufacturer's documentation mentions bypass considerations, but I need clarity on whether this is mandatory or optional equipment.

Specifically, I'm concerned about maintaining proper flow rates through the heating unit and having the ability to isolate the heater during routine maintenance procedures. What are the technical requirements and operational benefits of incorporating a bypass valve system into the heater plumbing layout?…more
Can a Pool Sand Filter Be Too Big? Sizing Problems Explained
Filters Medium 45 minutes 878 👍 1

Can a Pool Sand Filter Be Too Big? Sizing Problems Explained

During our weekly pool maintenance routine, my husband casually mentioned that our 15,000 gallon inground pool's water has looked consistently cloudy despite my best filtration efforts, and now I can't stop obsessing over what's wrong. The water isn't cloudy exactly, but it lacks that crystal-clear sparkle and seems to have a slight haze that won't go away. My chemical levels are all in range - chlorine at 2.5 ppm, pH 7.4, alkalinity 110 ppm, and I've shocked multiple times with no improvement.

I recently upgraded to a larger 24-inch sand filter thinking bigger would be better, but I'm starting to wonder if I made a mistake. My pump runs at about 45 GPM, and I've noticed that when I backwash, the water doesn't seem to flow very forcefully compared to my old smaller filter. Could the filter actually be too large for my system? I've heard that oversized filters can cause problems, but I'm not sure how to tell if that's what's happening here.…more
How to Tell if Your Pool Pump Isn't Working Properly
Pump Problems Easy 15 minutes 307 👍

How to Tell if Your Pool Pump Isn't Working Properly

This 4-year-old pool pump is turning my once-crystal-clear water cloudy and stagnant — is it worth repairing or should I just replace the whole thing? I'm not super technical when it comes to pool equipment, so I'm not sure what warning signs I should be watching for.

What are the telltale signs that indicate my pump isn't doing its job properly? I want to catch any problems before they turn into expensive repairs or leave me with a swamp instead of a swimming pool!…more
How Variable Speed Pool Pumps Work - Complete Guide
Pump Problems Medium 15 minutes reading 355 👍

How Variable Speed Pool Pumps Work - Complete Guide

Woke up to another $400 electric bill after replacing my pool filter, cleaning the skimmer baskets, checking all the connections — my single-speed pump is still draining my wallet on this 20,000-gallon inground pool. My utility bills have been astronomical running the pump 8-10 hours daily, and I'm trying to understand exactly how these newer pumps achieve such significant energy savings.

Specifically, I'd like to know what type of motor technology variable speed pumps use and how they're able to adjust their speed so precisely. My current pump seems to be either on full blast or off completely. What's the RPM range these variable speed units can operate in, and how does that translate to better flow control and lower energy costs? I want to make sure I understand the technology before investing in what seems like a more expensive upfront purchase.…more
Do I Need a Bigger Pool Pump? Complete Sizing Guide 2026
Pump Problems Medium 2-3 hours for assessment and calculations 313 👍 1

Do I Need a Bigger Pool Pump? Complete Sizing Guide 2026

Turned out my husband was right when he said our pool water looks like weak tea despite perfect chemical levels, and now I'm questioning if our pump is actually doing its job. My pool is about 20,000 gallons and I have no idea how long it takes for all the water to cycle through.

I want to make sure the filtration is strong enough to remove bacteria and contaminants effectively. How do I know if I need to upgrade to a more powerful pump? What should I be looking for to ensure the water is turning over frequently enough for safe swimming?…more
Can You Swim During Your Period? Pool Safety & Hygiene Guide
Maintenance Easy 5 minutes 535 👍

Can You Swim During Your Period? Pool Safety & Hygiene Guide

Wondering why my period only seems to show up when it's scorching hot outside and I desperately want to jump in my pool? I've heard mixed things about hygiene and whether the water stays clean enough.

The pool store guy tried to sell me all these expensive "sanitizing boosters" when I mentioned having guests over, but I'm already spending way too much on chemicals as it is. Does regular chlorine actually keep things sanitary enough for swimming during menstruation? And is there any real risk to the water quality or other swimmers?…more
How Long Should a Pool Pump Last? Lifespan & Replacement Guide
Pump Problems Medium 2-3 hours for replacement 438 👍

How Long Should a Pool Pump Last? Lifespan & Replacement Guide

Got a weird grinding noise from my pool pump last month but now it's barely pushing any water through the system!
My current pump is about 6 years old and still running fine, but I'm wondering when I should start budgeting for a replacement.

I've heard different things from pool store guys - some say 5-6 years, others say they can go way longer. Mine's been pretty reliable so far, but I'd rather not get caught off guard. Are there any warning signs I should watch for that mean it's time to start shopping around? And does it matter if I upgrade to one of those variable speed pumps everyone talks about?…more
Variable Speed Pump RPM Settings for Energy Savings Guide
Equipment Easy 30 minutes 1,934 👍 61

Variable Speed Pump RPM Settings for Energy Savings Guide

Three weeks ago I had a variable speed pump installed to replace my old single-speed unit, and I'm worried I might be creating a safety hazard by running it incorrectly. The installer didn't give me clear guidance on what RPM settings to use, and now I'm concerned that running it too slow might not be circulating chemicals properly around my pool where my young children swim daily. Is it dangerous if the water isn't moving fast enough to distribute chlorine evenly? I've been experimenting with different speeds but have no idea if I'm putting my family at risk with poor water circulation or wasting energy by running it too fast.…more
How to Fix a Clogged Pool Pump Impeller
Pump Problems Medium 45–90 minutes 50 👍

How to Fix a Clogged Pool Pump Impeller

My pool pump started making a grinding noise yesterday and the water flow through the skimmer has slowed to almost nothing — and we're hosting a big backyard pool party this Saturday. The filter pressure is reading lower than normal, which I've read can mean a clogged impeller. I pulled out the strainer basket and it had some debris in it, but even after cleaning it out the flow is still weak.

I'm pretty handy and would love to tackle this myself if it's doable without a pro. Can anyone walk me through how to actually get into the impeller and clear it out safely? I want to make sure I don't damage anything in the process — and I definitely need the pump running properly before the weekend.…more
How Salt Water Pool Systems Work: Complete Guide 2026
Salt Water Medium 45 minutes 1,334 👍 2

How Salt Water Pool Systems Work: Complete Guide 2026

Despite my pool guy insisting I need to understand salt water electrolysis to maintain my system, his overly technical explanation makes me think he's overcomplicating things.
Specifically, what happens at the cellular level when salt water passes through the system? How does dissolved sodium chloride get converted into an effective sanitizing agent, and what role does electrolysis play in this conversion process? I want to grasp the complete operational mechanism before investing in this technology.…more
Do I Need to Run My Pool Pump Every Day? Complete Guide
Pump Problems Easy Daily routine - 8-12 hours pump runtime 286 👍

Do I Need to Run My Pool Pump Every Day? Complete Guide

Three hours of constant humming from my pool pump has me wondering if that grinding undertone means I'm overworking it or not running it enough. I have a 20,000-gallon inground pool that gets moderate use from my family of four, plus occasional guests on weekends. During the summer months, I've been running the pump about 6 hours per day, but I'm noticing that my chlorine levels seem uneven throughout the pool, and I'm wondering if that's related to insufficient circulation.

I've heard conflicting advice from neighbors - some say 4-6 hours is plenty, while others insist on 12+ hours daily. My pool store recommended 8 hours minimum, but I want to make sure I'm not under-filtering while also being mindful of electricity costs. Does the runtime need to change based on season, bather load, or pool size? What's the sweet spot for maintaining crystal clear water without over-running the system?…more
Do I Need a Sand Filter for My Pool? Complete Guide
Filters Medium 45 minutes 262 👍

Do I Need a Sand Filter for My Pool? Complete Guide

Since my pool water keeps turning cloudy even after cleaning, is it dangerous for my kids who swim almost daily? My pool has been a constant headache and I'm wondering if switching to a sand filter would solve my problems, or if there are better options out there.

I keep hearing different things - some people swear by sand filters because they're supposedly low-maintenance, others say cartridge or DE filters work better. My pool isn't huge but gets decent use, and honestly I just want something that actually works without me having to mess with it constantly. What's the real deal with these different filter types and how do I know which one would work best for my situation?…more

Pool Saved to Cloud

Your sync code (use this to load your profile on another device):

Write this down! There is no way to recover it if you lose it and clear your browser.
Pool Calculator Free all-in-one dosing tool