To prevent Algae in a sun filled pool

[revamp]

Hi Guys!

I’ve come into this pool with a new house and I’ve done a lot since then but still struggling to keep algae out and the balance of chemicals. Here’s my process

It’s a pebble tec pool, around 13-14k gallons. When I started with the pool after I bought the house it was in really bad shape but I drained the whole pool, cleaned it and refilled it.

I clean the pool once a week by scrubbing with a brush and vacuuming the bottom. I clean the top twice or three times a week.

The pool gets sun probably 8 or more hours a day. It has an inline chlorinator that I don’t use because prior to me owning the house, the cyanuric acid was 150+.

I fill the pool 2-3 times a week for about 30 minutes with fresh water but it is tested at a high PH of around 8.1. With this I use muriatic acid twice a week with 22ounces.

I do anywhere from 16-64 ounces of liquid chlorine 2-3 times a week and I get it tested once a week at Leslie’s to figure out anything else I’m missing and follow those instructions otherwise. Outside that I’m doing no phis when they say I’m over 100 because they are doing work in the house being mine and it raise the phosphates a lot within the week.

What am I missing, am I doing something wrong here?

 

[PoolStored]

Welcome to TFP!!!

First thing to do is get one of our recommended test kits. Order one now. Link-->Test Kits Compared

I would add 5ppm of liquid chlorine per day. Nothing else. Download pool math, configure your pool, and use "effects of adding" function to figure out how much liquid chlorine to add. (Hint, you should get 90 ounces of 10% liquid chlorine to raise your FC by 5. Add nothing else to the pool.

When the kit arrives, post a full set of results. FC, CC, pH, TA, CH, CYA.

For the CYA test, if you get 90 or above on the first test, do test #8 here.

CYA - Cyanuric Acid Test

Cyanuric acid (CYA) is the chemical name for the product commonly called “pool water stabilizer” … Read more…

www.troublefreepool.com

If your CYA is high, you will want to replace water to get CYA down below 60. If your CYA is 100, you need to drain 40% to get to 60. Read "no drain water exchange" here:

Draining - Further Reading

www.troublefreepool.com

 

[TinFoilHat]

This ^^^ Ditch the pool stores and do your own testing, especially since you're doing your own maintenance. Phosphates = nothing to see here. Read through the Pool School here and learn everything about what you didn't know. This forum espouses a chemistry-based method that will give you a clean and sanitary pool based on your CYA/FC relationship and keeping your other parameters in line. You're not far from solving this so stick with it and follow the direction of this forum.