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Depressurized and opened my Pentair FNS+ 48 DE filter this morning to clean it as I've done many times previously. Much to my surprise the bottom half of the tank was 2/3rds full of water. I know there's plug that comes off at the bottom of the tank but I'm concerned that I may have a bigger...

So from my info you will see that I have a Pentair FNS+48 DE filter. Over time removing the clamp assembly to clean my filter has become a real workout. I replaced the barrel nut a year ago and thought I had solved the problem. Apparently the bolt itself can become stripped over time. This is an...

Need to convert pounds of powdered chlorine to fluid ounces or gallons....help please? Thanks!

Hello! I switched to cellulose fiber filter medium for my Pentair FNS 48 DE filter some years ago. The last time I did a full filter cleaning, and having done one backwash a number of months prior to the full cleaning, I noticed that there seemed to be a scant amount of the cellulose fiber...

I've been staring at this deteriorated concrete around my skimmer deck lid for awhile....:( There's water underneath it (duuuh) so it's not so easy as to simply concrete over, right? Any construction gurus out there with a creative solution that might not cost $100's and $100's? Appreciate...

Hello! 48 hours into a SLAM. Initially took pH to 7.4 with acid and mustard algae shock level according to pool calc. Then let FC drop to SLAM level and have maintained 16 FC based upon 40 CYA for 48 hours. Overnight test showed pool at 15 FC, 0 CC, and water is pretty darn clear. ( no direct...

Ok so it's my first time doing SLAM..at least properly anyway... Pool was drained and acid washed back in April 1)'cuz it needed it and 2) last season had mustard algae from heck that I unsuccessfully attempted to treat. Thought that acid wash would eliminate any residual algae.....but no, it's...

Very shortly my pool will be drained and acid washed. I am sure that the person I selected to do this work will provide instructions as to how to treat the new water once we begin to refill but I am interested in the expert opinions I have always received from this forum. This is my first...

I took apart and cleaned my Pentair FNS DE filter today as I have done previously with great success. When I removed the cover this morning I noticed that the "sock" on the internal air bleed assembly, which is mounted on top of the manifold, was badly cracked. Went to the pool store and they...

Hope I have placed this question in the correct forum.. I have one skimmer for my pool and at the deck level above it there is concrete with a metal grate in it for access. Over the years, this concrete has begun to crumble and break away exposing the rebar underneath. Big chunks are now...

Previously got good scoop from Jason about using the Pool Calculator to get my CSI slightly negative in order to loosen calcium scale which is blue in spots from use of copper based algaecide. Plaster is 5 years old and in good shape up until I took over pool maintenance a year ago, and before...

Got my Taylor test kit a month or so ago and understand how to use it now....been testing regularly. Here are some recent results and then I will get to my problem. BTW - can't get a calcium hardness reading at all. Test water is pink, stays pink, won't go to blue no matter how many drops I use...

Did a light treatment of AA today for blue stains previously identified by a stain specialist as copper from my enthusiastic use of algaecide :oops: Staining was not what I would consider extreme so I went with a lighter application than recommended just to see what results I might get. Added...

New to this forum and thought I would attempt to get some basic trouble shooting advice. Somehow my system is getting air in it. I read a previous post to start with filter basket o-ring and apply silicone spray. Is this silicone spray the all purpose variety you can buy at big box store or...