Serious Algae Problem - Need Help!!

[julia424]

Hello fellow pool people,

I desperately need some advice on how to handle a serious algae problem in my pool (see pics). Despite every effort the problem has gotten worse.

I recently switched the brand of pool chemicals I use from Leslie’s to Pool Time because I didn’t think Leslie’s was doing a very good job. Here are the products I currently use:

Pool Time shock max blue 6 in 1
Pool Time 3 inch tablets
Pool Time Algicide 50
Liquid Chlorine and Liquid Acid

I wasn’t happy with Leslie’s but now I’m wondering if the Pool Time products are inferior to Leslie’s because the problem has gotten worse.

I should mention that I check my pool chemicals regularly and the acid levels have been very stable at 7.5. The chlorine level has been very hard to keep up. I add shock once a week and at least one gallon of liquid chlorine. I also have two floaters that use a tablet each per week.

I have a 17,000 gallon pool and the water level drops about 5 inches per week (Las Vegas heat!) so I am constantly adding fresh water. I last refilled my pool completely in July 2019 and my filters are clean.

It has been in the past day or so the water has become cloudy green to where I can barely see the pool vac moving around the pool floor. Really stressed and needing help!!

Thank you,
Julia

[RDspaguy]

Test for phosphates and cyanuric acid. Add 5 gallons liquid chlorine (10%).