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Two nights ago at about 11:00pm there were about 9 slightly drunk teens enjoying the pool for about an hour. I expected the chlorine to be low the following mourning but it was only down 1ppm from what I was expecting. The following day with the cover on and no usage and 2ppm chlorine added...

Yesterday I backwashed my sand filter until the water coming coming out was almost clear. I then took off the multiport valve and rinsed the sand with running water from the hose for 15 min. The water that was overflowing from the filter was very dirty and brownish at first. After rinsing I did...

My fill water has TA of 210. Any thing I can do?

Im getting to the end of shocking and am wondering the most effective way to shock or clean the solar cover? Ive been shocking for two weeks now and the sand filter has almost cleared the cloudy water. I'm expecting another week of shock. Thanks Bri

What size hayward cell work be best for a 21,000 gal pool?

If the olct test is 0.5ppm , cc at 0.0 but water is still a little cloudy ( sand filter) can I stop shocking. Really sunny this last week and burning through a lot of bleach (6 to 8 liter/day) Thanks

Why would one go with chlorine injection over SWG?

My closed pool has algae on the mesh cover. What can I do for this? I plan to open pool and start shocking next week.

I'm curious to know if the shocking process with a cya of 70 uses the same amount of chlorine a pool with cya of say 30? I know the ppm will be higher but would there be a difference in the total amount used?

I understand the target and min levels of chlorine but how do I determine if i need extra chlorine for bather load. Do I turn up the SWG before the party or after? Do I dose with liquid and how much? Last summer the water went cloudy after a few kids spent the afternoon in the pool. I think I...

If I shut off my pump and then turn it on dirt passes through my sand filter into my pool. The Sand is one season old and was bought at the local pool store. Is this normal or is the sand too course? I've put DE media in but I fear it will also pass through. I let the pressure build 25% before...

My CYA is at 70, I keep my chlorine around 6 but sometimes up at 11 (swg pool). When I opened this year my filter is letting sand into the pool and the 7 way valve is allowing water to drain when is set to recycle. It is an old Jucazzi Laser 190 With a Praher 7 way valve. My pool is 60,00 liter...

Is it a reasonable idea to put a small submersible pump to circulate water from bottom of pool to top. The pool is not opened yet and the solar cover is on. I noticed that the surface temp during sunny day to be 50 degree but only 40 degree 4 foot down. Would the pump increase the solar...

I've taken the winter cover off and put on my solar cover but have not started my pump because average low temps are -2 degrees. Is there any reason to test water before pump\filter are on? Should I try to adjust chlorine levels without circulation or should I just wait the few weeks? Is there...

My pressure seems high. I think I put too much sand in which could be increasing the pressure. How many inches above the laterals should the sand be?