I have an in ground pool with DE filter. We are experiencing high pressure in the de filter and also have low return on the jets in the pool, to the point where all the jets will not all work at once. We recently put in a new pump, same HP as the old one (1.5). We also backwashed and hosed down all the grids, which were replaced the beginning of this season. Any thoughts?
high de filter pressure; low jet return
- Thread starter zray
- Start date
Welcome to TFP!!!What does the water look like?
You add DE after every backwash and cleaning right?
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The water was clear on Thursday. But on Friday, when we noticed the high pressure, we turned off the pump on the pool got cloudy. Today, after backwashing, we turned on the pump. But the pool is still cloudy. We added shock, chlorine and baking soda.
I am not sure about the size of the pool, as we bought the house 3 summers ago. The pool is 15 years old. The pump and filter grids are all new, replaced the beginning of this season. It is large and inground. We are in Freehold, NJ.
I am not sure about the size of the pool, as we bought the house 3 summers ago. The pool is 15 years old. The pump and filter grids are all new, replaced the beginning of this season. It is large and inground. We are in Freehold, NJ.
Did you put DE in the filter? Do you have a heater? Are any pressure side valves closed?
You just have a clogged filter. It sounds like you were just staying even with an algae bloom. One day with no circulation shouldn't have made it go cloudy, not unless you had a massive pool party or something. Odds are you've been killing algae as fast as it grows, creating a never-ending supply of dead carcasses to filter out. That clogged your filter, and now the water is going to get cloudier and cloudier until it goes green.
Adding "shock: may not have been the right thing. If you're already suffering from high CYA/ inadequate chlorine for your CYA level, and that "shock" contained dichlor or trichlor, you may have made things worse.
My guess is you need a SLAM. That's shock level for days and days until it's cleared up and you pass a couple tests that show the algae is indeed dead. Pool School - SLAM - Shock Level And Maintain
Adding "shock: may not have been the right thing. If you're already suffering from high CYA/ inadequate chlorine for your CYA level, and that "shock" contained dichlor or trichlor, you may have made things worse.
My guess is you need a SLAM. That's shock level for days and days until it's cleared up and you pass a couple tests that show the algae is indeed dead. Pool School - SLAM - Shock Level And Maintain
Another backwash and maybe a teardown and scrubbing. Then fresh DE and the SLAM process to stop the creation of what's clogging the filter. Expect to need several backwashes before the SLAM process is through. DE filters do almost too good a job, and can clog within hours if there's an algae bloom.
As to the other questions, we put DE in after we backwashed. Although, I am thinking that made it cloudier. We have a heater and the bypass valve is closed. The DE filter and heater are both Hayward.