Hello everyone! I am new to this forum, but belong to others and greatly appreciate the experts who contribute their time, expertise and advice to help others.
My pool is a 20x40 steel wall/vinyl liner (installed last year) 36k gallon igp. I have a 1.5hp Hayward pump/DE filter (model 4800? I think), without a heater.
I pulled the cover off about 3 weeks ago. The water looked great (clear) with some leaves in the bottom. I raked out about 80%, and then unexpectedly had to go out of town for a few days. I then assembled the filter and found the pump motor burned out. A replacement took 2-3 days. By this time the pool water was a green swamp. Added a case of shock (4 gallons 12.5% sodium hypochlorite) and ran the filter overnight. The next morning things were much worse. Very cloudy/murky and deep green. I couldn’t see more than 6” below the surface. Looking at the return jets I could see DE coming out. Disassembled the filter to check the grids and found the top manifold cracked. A replacement took another 3 days. Inspected the grids - all seemed fine (but replaced 5 of the 8 since I had new ones on the shelf). Added another ~8 gallons of shock to turn the water more blue than green, and let the pool settle overnight. In the morning I vacuumed the shallow end to waste where I could see DE pooled on the bottom, but I cannot see into the deep end so pushing the vacuum around - which I did, is like working blindfolded.
I added some algecide which produced some foam. Okay, a LOT of foam. About 1/3 of the pool surface is covered with foam. I then took a water sample to Leslies for analysis (results are ugly):
Free Cl2 = 0.18
Total Cl2 = 0.42
pH = 8.1
Total Alk = 48
Ca hardness = 116
Cyanuric acid = 5
Iron =0.1
Copper = 0
Phosphates = 152
TDS = 900
Today I added approx 30lbs alkalinity up and about 7 lbs of dry acid (over about 12 hours as directed). In the morning I’ll add a couple of gallons of shock and have the water checked again, but I see little change in the appearance. The tech at Leslies felt my issue was related to pool chemistry, but I believe even once the water is properly adjusted I will still have a DE problem causing the cloudiness.
I should also mention I have a ring around the perimeter what looks like granulated chlorine. I’ve only use liquid shock (since forever), and believe what I am seeing is DE aggregating (result of the algecide).
I am looking for comments/advice on next steps. The usual guidance on a DE problem is to turn the filter off (for how long? 12 hrs?) to allow the DE to settle which should clear the water and allow me to vacuum it to waste. So far it has not settled enough. Also - why do I need to vacuum to waste? Aren’t the filter grids designed to capture DE? I recognize this might cause the filter pressure to raise quickly - but I can watch that and switch to waste and/or backwash if needed.
Again - I appreciate comments/advice.
I will attempt to attach a photo (could be the worst foaming anyone has ever seen!).
Thanks in advance.
My pool is a 20x40 steel wall/vinyl liner (installed last year) 36k gallon igp. I have a 1.5hp Hayward pump/DE filter (model 4800? I think), without a heater.
I pulled the cover off about 3 weeks ago. The water looked great (clear) with some leaves in the bottom. I raked out about 80%, and then unexpectedly had to go out of town for a few days. I then assembled the filter and found the pump motor burned out. A replacement took 2-3 days. By this time the pool water was a green swamp. Added a case of shock (4 gallons 12.5% sodium hypochlorite) and ran the filter overnight. The next morning things were much worse. Very cloudy/murky and deep green. I couldn’t see more than 6” below the surface. Looking at the return jets I could see DE coming out. Disassembled the filter to check the grids and found the top manifold cracked. A replacement took another 3 days. Inspected the grids - all seemed fine (but replaced 5 of the 8 since I had new ones on the shelf). Added another ~8 gallons of shock to turn the water more blue than green, and let the pool settle overnight. In the morning I vacuumed the shallow end to waste where I could see DE pooled on the bottom, but I cannot see into the deep end so pushing the vacuum around - which I did, is like working blindfolded.
I added some algecide which produced some foam. Okay, a LOT of foam. About 1/3 of the pool surface is covered with foam. I then took a water sample to Leslies for analysis (results are ugly):
Free Cl2 = 0.18
Total Cl2 = 0.42
pH = 8.1
Total Alk = 48
Ca hardness = 116
Cyanuric acid = 5
Iron =0.1
Copper = 0
Phosphates = 152
TDS = 900
Today I added approx 30lbs alkalinity up and about 7 lbs of dry acid (over about 12 hours as directed). In the morning I’ll add a couple of gallons of shock and have the water checked again, but I see little change in the appearance. The tech at Leslies felt my issue was related to pool chemistry, but I believe even once the water is properly adjusted I will still have a DE problem causing the cloudiness.
I should also mention I have a ring around the perimeter what looks like granulated chlorine. I’ve only use liquid shock (since forever), and believe what I am seeing is DE aggregating (result of the algecide).
I am looking for comments/advice on next steps. The usual guidance on a DE problem is to turn the filter off (for how long? 12 hrs?) to allow the DE to settle which should clear the water and allow me to vacuum it to waste. So far it has not settled enough. Also - why do I need to vacuum to waste? Aren’t the filter grids designed to capture DE? I recognize this might cause the filter pressure to raise quickly - but I can watch that and switch to waste and/or backwash if needed.
Again - I appreciate comments/advice.
I will attempt to attach a photo (could be the worst foaming anyone has ever seen!).
Thanks in advance.