In three days I have used 900 litres (237 gallons) 15-17% bleach, 60 kgs 132 lbs) Dichlor, and 60 liters (15 gallons) of muriatic acid! My pool is still green/yellow, bottom barely visible, a lot of sediment.
Numbers this evening: FCL > 1, TCL 6, Ph 8.1, TA 9, CH 2 , CYA 28 .
No, these are not misprints... although the single figure TA and CH may be out of range readings from my color Q. Reagents are fresh.
Pool is less than half full, about 20,000 galls.
History: Had to drain pool for the first time in 9 years to carry out essential plumbing repairs, changing out rusted galvanized steel pad piping, manifolds, valves etc which were beyond repair and leaking seriously, for all PVC. Pad is below the pool waterline. This went well with one exception, and is now all working and watertight, pump is good, filter also.
I take my water from a local creek that is pumped up from the valley bottom to a large, concrete, closed holding tank, then pumped into the pool. Tank holds about 1/3 pool volume and also collects rainwater runoff from roofs and driveways.
The exception is that I forgot to solvent weld one joint, one of the lowest ones, of course ... duh! Started to fill, noticed the leak, pumped the water back into the holding tank, fixed leak, started to fill again. Water very quickly went green and threw a yellowish sediment despite me 'firebombing' it with chlorine as the fill started. Very likely the pump back process stirred up sediment etc. in the holding tank. I have no other source of water. I stopped the fill at half way (main drain and returns all under water and pumping) then went SLAM crazy as the above quantities show, managed to get the Ph down to 7.0 briefly, but absolutely no significant FCL showing at hourly testing and essentially adding bleach, then dichlor as fast as I could throw it in.
I have managed the pool for several years with no significant issues thanks largely to what I have learnt here on TFP (big thanks) with the same water source and testing regime and am reasonably familiar with both the chemistry and the hydraulics of my pool, but this really has me stumped. I can only imagine that there is some kind of algal growth that is consuming impossible amounts of chlorine. Please make any suggestions of what I can do next. I'm on the verge of giving up, trying to source a tanker supply of water (difficult, really expensive, 10 loads or more, 160 tonnes of water... ) Naturally my daughter is turning up at the weekend with 20 friends for a pool party, oh well.
Numbers this evening: FCL > 1, TCL 6, Ph 8.1, TA 9, CH 2 , CYA 28 .
No, these are not misprints... although the single figure TA and CH may be out of range readings from my color Q. Reagents are fresh.
Pool is less than half full, about 20,000 galls.
History: Had to drain pool for the first time in 9 years to carry out essential plumbing repairs, changing out rusted galvanized steel pad piping, manifolds, valves etc which were beyond repair and leaking seriously, for all PVC. Pad is below the pool waterline. This went well with one exception, and is now all working and watertight, pump is good, filter also.
I take my water from a local creek that is pumped up from the valley bottom to a large, concrete, closed holding tank, then pumped into the pool. Tank holds about 1/3 pool volume and also collects rainwater runoff from roofs and driveways.
The exception is that I forgot to solvent weld one joint, one of the lowest ones, of course ... duh! Started to fill, noticed the leak, pumped the water back into the holding tank, fixed leak, started to fill again. Water very quickly went green and threw a yellowish sediment despite me 'firebombing' it with chlorine as the fill started. Very likely the pump back process stirred up sediment etc. in the holding tank. I have no other source of water. I stopped the fill at half way (main drain and returns all under water and pumping) then went SLAM crazy as the above quantities show, managed to get the Ph down to 7.0 briefly, but absolutely no significant FCL showing at hourly testing and essentially adding bleach, then dichlor as fast as I could throw it in.
I have managed the pool for several years with no significant issues thanks largely to what I have learnt here on TFP (big thanks) with the same water source and testing regime and am reasonably familiar with both the chemistry and the hydraulics of my pool, but this really has me stumped. I can only imagine that there is some kind of algal growth that is consuming impossible amounts of chlorine. Please make any suggestions of what I can do next. I'm on the verge of giving up, trying to source a tanker supply of water (difficult, really expensive, 10 loads or more, 160 tonnes of water... ) Naturally my daughter is turning up at the weekend with 20 friends for a pool party, oh well.