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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?

I'm at 16 days shocking with sand filter. I can make out the screws on the bottom drain but the the water is not crystal clear. I'm also impatient to stop shocking and increasing CYA to 70ppm. this is my first algae bloom and hopefully my last. I'm also shocking the solar cover for a few days.

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?

cya level is 30. I'm impatient. Losing 1/2 to 2/3 chlorine to the sun just hurts. Thanks for the encouragement, I will to continue to shock. When I think about it, the pool has come a long way from a thick, smelly swamp to partially cloudy in 9 days. Yes I'm also using DE when I'm home for a...

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

what are the advantages and disadvantages of of both systems?

From what I have read I cant understand why more pool owners don't use this system. SWG seems so complicated. You guys have me considering a new project. How long does a SWG cell last in a seasonal pool (5 months)?

Is it easier to control the chlorine levels for seasonal adjustments and bather load over a SWG?

Why would one go with chlorine injection over SWG?

Water drains into the pool and the pool is so full the cover is under an inch of water. I peeked under the cover and the water is green.

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.

yes. I understand that you have to bring the ppm to 30, but will the total chlorine usage from start of shock to 2 week after overnight loss test (pass) be the same, regardless of the cya in the pool. I'm trying to get my head around the high shock level. Oh yah I have a swg. I would think it...

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 knew something was up when those kid stayed in the water all afternoon. I wish I could get some of that red dye that would expose who was urinating in My pool. Thanks for the info.

Thanks, How many ppm per child? kidding. Ice just melted today in pool. Cool spring in Barrie Ontario

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...

no, I checked them all ready. Good condition.

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...

Thanks, cheaper then a new filter. Could a faulty spider gasket cause sand to flow into pool when set to filter?

The valve is a Praher model TM 12. Im sure I could replace some parts but I'm concerned about the sand passing through the filter when it is set to filter. Could a faulty valve cause this? The pump is a Hayward Super Pump model C48J2N131B3. If I opened the valve up would I see the problem. Which...

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...

Thanks for the reply. After a backwash it sit at 16lbs but I just looked at the gauge with the pump off and is at 2 lbs. I think that's the problem.

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?