algae

We finished our owner/builder pool up about 6 months ago and I thought all was well. I downloaded Pool Math, set up my subscription, and started logging my tests. The water has stayed crystal clear since day one, and for the most part, I've been diligent on the maintenance and chemical...

My CYA level (>90) appears to be interfering with my algae control. I understand that to reduce my CYA level, I have to pump down my pool and add fresh water. Can someone provide guidance on how much old water to remove and replace? My pool is 16 x 32 and has about 21,000 gallons. Thanks Bob

Hi all, I have been fighting green algae accumulation and proper LSI balance in our pool all summer without success. Any help would be appreciated! The pool water is not green, but green algae is slowly growing on the pool sides despite good FC levels and slamming. I started in mid July...

I have a ring around the pool floor it has been there for years. Recently have decided to attack it, tested it with a vit C tablet but nothing thinking it was mustard algae have been scrubbing it hard 2-3 times a day for 3 days with pool brush and have increased the chlorine to 3-4 Liters at...

Hello! First summer with a pool here! Wondering if this looks more like sand or algae? It brushes away easily, so I’m thinking algae, but it keeps returning! I have tried vacuuming to waste and triple shocking and it returns within the next day or two. Here is a picture from tonight...

Hi, At the end of spring, we decided to set up our intex above ground pool ( it's a round 12 m³ pool ) and everything went good. After a month, the water started turning really green and we got rid of the algae by shocking, but now there is a lot of stuff dissolved in our pool that turns the...

Hi there TFP folks! Name's Matt, I'm a newbie (both here on the site and as a pool owner). I've lost faith in local pool store folks, they only appear to want to sell me chemicals (and lots of em!). I've been silently following the prescribed SLAM instructions on this site. I'm an engineer and...

I have been having difficulty maintaining a proper chlorine level in my pool this whole summer (has actually been an ongoing issue since 2017 but much worse this year even though I purchased a new pump and filter system last summer, and this pool has been partially drained twice since 2017...

Hi TFP! I'm new here - been lurking for a few months but now I need some help! First month of pool ownership was a breeze (May 1-June 1). I used the test strips (LOL) and had no issues. Water was clear and all was good in the world. Then, around June 1, we started seeing some sediment in the...

So I have been fairly fastidious on maintaining my water chemistry. However, after some significant rain, I have an algae bloom. My chlorine (by tablet) is high as is my free chlorine. How do I get an algae bloom with high chlorine? What am I doing wrong. Says my ph is low. I thought...

I found my pool had some minor algae problem about 1.5 weeks before. I followed Leslie's guide to try to remove it by applying "Green To Clean", and 3 times of shock followed by the Leslie's Clear Aid. Now the water looks clean. But, after several days finishing the treatment, I found algae...

I have had algae now for the past three weeks. No matter what I do it won’t go away. My levels are all good but still green water. I’m almost ready to just close it for this season. I did talk to my friend at the pool store and his only suggestion was maybe a bad cartridge in the filter but I...

Hello, First post and came across this site from researching DIY pool care. I just moved into a house a few weeks ago that has a pool and I started noticing this build up on the bottom of the pool. At first I thought it was pollen because there are several tall trees behind the pool, but then I...

Bought a house that came with a neglected above ground pool (no idea how long). We purchased a new sand filter, cleaned out debris, shocked and got it to cloudy blue over the course of about a week. It has now been cloudy for over a month & 1/2 and we can not get it clear. Since the original...

Hey everyone! We bought our new house in March and the first thing I did was fall for the “bring your water to us and we’ll spend your money for you!” pool store gimmick. Surprisingly, they said my water was perfect (it didn’t look perfect) and I didn’t need anything (as a new home owner with...

I have an above ground pool that is 22’ by 52” with a salt water sand filter. I went out of town for a week and when I can home I seen that my pump tripped out and the pool is green. I threw 3 pounds of Trichlor shock and allowed the filter to run continuously for two days and nothing happened...

So i have a question. My pool is an outdoor pool with metal-sides and a rubber bottom. Over many weeks now i have maintained my pool every day. PH is 7,6 and Chlor is between 1,5 and 2. I use the phenol red and dpd1 tablets to Measure - and i measure every day and add chlor every day - to keep i...

Hi, I'm new to TFP but already this community has saved me a considerable amount of time and money maintaining my pool so thank you for that. I just went through the process of relocating my pool equipment pad and installing all-new equipment on top of that. I also switched from chlorine to a...

Our pool is a 15 year old people tech pool. 3 years ago we started battling green algae. Our pool has always been with a paid service but the quit. We got a new service, dumped water (1-1/2 year ago), replaced sand in sand filter, then they quit after throwing a lot of extra money in. New guy...

Hi. I'm new to pool ownership. We bought our house last summer and I kept up maintenance of the pool all summer long according to information I found on this site (thanks alot!). I decided to forgo the pool maintenance over the winter since we weren't using the pool and would just clean it up...

Hi all: I am a pool newbie. Moved into a house over the winter and ignored the pool .. Now I am starting it back up. The pool was green. Pool is in ground, large and with a DE filter. Heres what I did: 1. Brough the TA and PH to range 2. Then I shocked the pool with calcium hypo shock. Once i...

I am getting ready to start the opening process in the upcoming weeks. I want to know if I should start pouring bleach into the pool now to kill off some of the algae now to make it easier for myself later?

Hey everyone! At the end of last year I had other things going on and let the pool get away from me a little bit, then made the horrible decision to just let it sit and fester over the long winter.. fast forward to two weeks ago, I had this nasty green pool you couldn't see half an inch into...

Hello all, new to TFP. haven’t done an OCLT yet (looking to get fas dpd test kit) could anyone confirm (by looks) is this is algae ? I think I’m in denial. There is a backstory including my SWG being out of whack for couple months and pool turning slightly green, I did the stainless steel...

First let me preface this by saying that I suck at pool work... I've been trying and last year I did well keeping up with levels. This year is a different story. The electrical conduit that runs out to the pool rotted away - The upper part of the cartridge filter cracked open - Then the lower...

Hi! This is my first season with a pool, although I've kept a hot tub for 20 years. I have an in-ground 20x40 pool, vinyl liner, glass media filter, but I mostly use a manual PoolBlaster Max Li for vacuuming. I have both the regular bag (I think they call it a "fine filtration bag") and a...

We neglected our pool for a few weeks (life got in the way) - and it is dark green, smells bad, and has fuffy stuff on the benches and floating on top. I scared to run the pump or our aqua-bot because I think they are going to get contaminated. We usually use the chlorine generator and add...

Hello! New pool owner here, Intex 18x48 with a sand filter to be exact. After spending weeks of the dreaded leveling and setting it up we were SO excited to finally get our pool up and running and thought it would be easy sailing going forward. Little did we know, that wouldn’t be the hardest...

I am needing help. I bought my house in December and in may when i opened my pool there was a whitish brown stuff on the bottom. it appeared to be sand and i believe it was. The stairs were held down with a bag of sand that was leaking sand and plastic. I replaced that. it still seemed to be...

Hello! I have a 10' Easy Set Intex pool that I'm battling algae with. I've tried shocking it with vinyl pool shock, replacing the filter cartridge, using a pool brush to sweep it toward the filter intake...nothing has worked. The worst part: I haven't even had a chance to use it yet since I'm...