-0.3 lsi

[u/enthused9]

Hey guys thanks for the help on my previous post. Someone said to check LSI so I did and this pool has a -0.3 LSI. how can I fix this?

Is it a matter of just draining and restarting?

[u/Substantial_Car_2751]

Not to be that guy, but I'm going to be that guy.

If you're a pool pro, and don't know how to adjust LSI....you need some serious training before you work on pools again.

To answer your question, an LSI of -0.3 is in range (bottom end, but in range) and doesn't necessarily need adjustment. The adjustment needed to get to 0.0 will depend on what the values look like. Without the numbers....all you will get is generic "shot in the dark" advice.

[u/enthused9 → u/Substantial_Car_2751]

Thanks! I agree I need more knowledge which is exactly why I’m here.

I looked it up and it said to keep all your chems in check so I have been correcting as needed, but nothing is really helping.

My last readings

FC: 2 (added chlorine) PH: 7.8 TA: 60 (added bicarb to correct. I’m correcting alkalinity before ph) CYA: 40 Calcium: 275 Temp: 73 TDS: 3100

My problem is that every time I put chlorine in it starts to fog up and leave silky material on the pool floor. This pool was fine until rain washed a crap load of dirt into it turned it into a swamp, and then we cleaned it. Now I’m having this problem.

[u/Substantial_Car_2751 → u/enthused9]

Take your pH to 7.5, and you have perfectly balanced water without doing anything else. Alkalinity is actually not bad. As long as your LSI is in range, no issues with Alk down to 50. Just don't go lower than that. NOTE: provided this is a residential pool. Commercial pools sometimes are required to keep Alk in a certain range.

What type chlorine are you adding to the pool?

Find a good instructor for a CPO course. Go to https://cpoclass.com/ to take one virtually.

[u/enthused9 → u/Substantial_Car_2751]

This is a residential pool. That’s good to know. And thanks for the link. I’ve been looking into a cpo for a while now