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Hi Tim, Thank you for your reply. They used Pool Scuba II test kit, what do you think about it? Person who works at store said that level is too high even when pool water is diluted with clean water 50/50. Their test kit was showing a maxim 200 and what is over 200 it was just a '---' score.

Hello, We became owners of a house which has a fiberglass pool with sand filter. We tested water at the suppliers store and they said CYA is too high and we should empty the pool and fill it with fresh water. They also explained risks of emptying the pool. Are there any other options? Could we...

Hi JJ, Thank you for your reply. We moved in our house a couple of months ago and water was transparent back than with a green spot on bottom. We had a couple of warm weeks in April and since then is became greener. We are renovating insiside if the house so did not pay to much attention to the...

Hi, We are struggling to turn our water from green to clear. Pool looks much better now then when we started but still not transparent. We've been backwashing sandfilter almost daily. We are wondering if it's fine. We backwashed yesterday and we could see that it works much better. The basket...

Hi, Moved to our house and just starting with pool chemistry/cleaning. Pool was covered during winter and filled with water, filter was running around 5 hours daily. Added ph+ before shock but did not raise level at all. Now we shocked it twice and level still won't rise. What should we try...

Hi Richard, Thanknyou for your reply. Water skimmer looks like this now. We just started our shocking process and filter runs 24/7

Hello, We schocked our pool yesterday and did a backwash before that. Since then the needle on the pressure gauge is oscillating and the filter is making a vibration and a humming noise. There are some air bubbles in skimmer basket but it is full and everything else seems to work fone. What...