I've used HTH algaecide - do I need to drain my pool?

[Whattf]

I added 3 gallons of bleach and 2 pounds of shock my pool is ~50k gallons by my estimate. I ordered the kit and I will report back with the results.

[PoolDoc]

50K gallons is a HUGE residential pool, and very unusual. A 30 x 60 lap pool with 4' ends and a 5' center would be only 57K gallons; a 20 x 40 block wall pool with a 4' shallow end, 12' flat deep end, the break at 10' from the shallow end and a flat bottom straight wall deep end would be only about 45K gallons.

Please measure the pool's dimensions. It's hard to dose correctly, with incorrect volume calculations -- but about 30% of pool owners use seriously incorrect values.

[Whattf]

Please measure the pool's dimensions. It's hard to dose correctly, with incorrect volume calculations -- but about 30% of pool owners use seriously incorrect values.

So, you're right. I re-did some rough calculations today. My pool is two heptagons (7 sided) joined by a rectangle (it's a custom made pool). It's apparently roughly 2100 square feet so it's roughly 15.5k gallons. Still waiting on my kit.

[PoolDoc]

Glad you were able to clear that up. Keep us posted.

[Whattf]

I got my K-2006 kit. FC - 0; pH- 7.4 ; TA - 90 PPM; Cyanuric Acid < 30 PPM

[PoolDoc]

1. Add 1 gallon of bleach EVERY night, for now. Skip if the PM chlorine result is dark yellow (OTO) or more than 3 ppm (DPD-FAS).

2. If you have access to Sams Club, purchase (2) 24# paks of bagged dichlor. This will add BOTH chlorine and CYA, but since it's bagged, what you don't use this year, will last till next year without getting all stinky.

3. pH => OK; TA => possibly low, but don't fix it yet. CYA => low. Calcium => needs to be tested. Since you have a concrete pools, you DO need to worry about "water balance" or "saturation index", which is a composite calculation involving pH + temp + TA + CH. If you have heater, it needs to be managed even more carefully.

[Whattf]

1. Add 1 gallon of bleach EVERY night, for now. Skip if the PM chlorine result is dark yellow (OTO) or more than 3 ppm (DPD-FAS).

2. If you have access to Sams Club, purchase (2) 24# paks of bagged dichlor. This will add BOTH chlorine and CYA, but since it's bagged, what you don't use this year, will last till next year without getting all stinky.

3. pH => OK; TA => possibly low, but don't fix it yet. CYA => low. Calcium => needs to be tested. Since you have a concrete pools, you DO need to worry about "water balance" or "saturation index", which is a composite calculation involving pH + temp + TA + CH. If you have heater, it needs to be managed even more carefully.

I understand you want me to use dichlor to increase both CYA and Chlorine in my pool. However, I don't have a Sam's club membership. Is there an alternative you can recommend?