Short Cycling

[donjoarm]

I have a Hayward multiport valve which allows me to bypass the filter by placing it in the recirculate position. I continued to circulate the water without filtering. I believe the post by PoolDoc indicates that you should still add the bleach until the algae is dead if you are unable to recirculate.

The most important thing I did was obtain a test kit which allowed me to know exactly what my CYA and chlorine levels are. This was the only way to determine what the necessary "shock value" is for my CYA level. Once you hit that Free Chlorine number and keep it there for a couple of days the algae will die.

Good Luck.

[edarling]

thanks for the reply. I don't have a multiport valve that allows recirculating, so that is not an option. I am adding lots of bleach and testing everything. I am seeing progress, but not as fast as if I was using my filter. I am using my Aquabot to clean the stuff out from the bottom, and it does circulate that water somewhat.

All the rain in my area (14 inches in some areas in MA) over the past weeks has really been a problem with pH and Alk, but it is good to allow vacuuming to waste and refill without using my well pump. WHen it stops raining, I will clean the filter and start circulating (I hope) with it. I'm hoping it will only take a few attempts at taking the thing apart and cleaning it.

- betty

[brent.roberts]

Edarling

It is not an extravagent expense to change the valve to the multiport that will allow you to recirculate. I think maybe $ 100. Check it out.

Secondly, some well written authors and myself, think that the Hayward DE filters with their bumping are a bad joke. The prinicpal is that you start with a clean filter, add DE and then run the system until the pressure builds up, then bump it. The pressure went up because the filter got coated with debris. When you bump it, you knock all the DE and debris off the membrane into a sloppy slurring the bottom of the tank. Then you re-start the system and the whole mess re-coats the membrane. All the debris, organic and otherwise is still in there !! The organic stuff is still going to consume your chlorine, inside the filter.

If you're having problems, forget the bumping. Backwash it and get rid of the contaminants. You'll clean the pool up much faster.

But, to really kill of algae you need lots of chlorine, in other posts above, but you really need to keep the water circulating to keep the algae exposed to the chlorine. Brushing helps too. So the valve with the bypass/recirulate setting will really help till the problem is cleaned up.