DE Filter. 20000 gallon pool Phoenix AZ where its over 100 degrees all summer. Can not drain the pool this time of year as the heat in Phoenix would damage the surface.
Total chlorine about 2ppm
Free Chlorine about 3ppm
PH 6.8
Total Alkalinity is ok at about 140 ppm
CYA 158ppm
TDS 5000 ppm
Gosh where to start. A bit of algae showed up about 2 months ago, thought I had it under control with shock and copper algaecide. But poor water quality is not allowing chlorine levels to rise up enough, even using 15 trichlor tabs a week, barely getting to 2 or 3 ppm. The water is basically clear, like surprisingly clear....but black algae continues to be prevalent on the walls and there are large areas of "stuck on or stained on" yellow or greenish algae on the floor. Pool service company has been fired as they have not worked hard enough to solve this. I have everything I need to service the pool myself. DE, vacuum, chlorine tabs, shock, brush etc. Back to square one and need an approach that might at least keep things from getting worse. It's Phoenix, so it's always hot this time of year so can't imagine I can eliminate the stuck on-stained on algae. Put in about 4 pounds of baking soda to get PH up but no improvement yet. Been brushing frequently and running filter almost 24-7. Should I use a metal wire brush on the stains?
Was thinking maybe 6-8 pounds of Cal hypo shock, wait 24-48 hours then maybe more copper algaecide? I could really use a step by step approach here. Like what to put in first, then do I brush or vacuum or backwash before adding something else etc. Should I keep using the baking soda? Do I wait a certain time after adding one thing and before adding another? etc etc. HELP!! Thanks so much for any insight.
Jay
Total chlorine about 2ppm
Free Chlorine about 3ppm
PH 6.8
Total Alkalinity is ok at about 140 ppm
CYA 158ppm
TDS 5000 ppm
Gosh where to start. A bit of algae showed up about 2 months ago, thought I had it under control with shock and copper algaecide. But poor water quality is not allowing chlorine levels to rise up enough, even using 15 trichlor tabs a week, barely getting to 2 or 3 ppm. The water is basically clear, like surprisingly clear....but black algae continues to be prevalent on the walls and there are large areas of "stuck on or stained on" yellow or greenish algae on the floor. Pool service company has been fired as they have not worked hard enough to solve this. I have everything I need to service the pool myself. DE, vacuum, chlorine tabs, shock, brush etc. Back to square one and need an approach that might at least keep things from getting worse. It's Phoenix, so it's always hot this time of year so can't imagine I can eliminate the stuck on-stained on algae. Put in about 4 pounds of baking soda to get PH up but no improvement yet. Been brushing frequently and running filter almost 24-7. Should I use a metal wire brush on the stains?
Was thinking maybe 6-8 pounds of Cal hypo shock, wait 24-48 hours then maybe more copper algaecide? I could really use a step by step approach here. Like what to put in first, then do I brush or vacuum or backwash before adding something else etc. Should I keep using the baking soda? Do I wait a certain time after adding one thing and before adding another? etc etc. HELP!! Thanks so much for any insight.
Jay
