Recent content by PWPINC

New filter, DE grids less than 6mo old had tears in a couple of the grids. Caused DE and sediment to flow back to pool. The DE on grids were coated with orange brown sediment that seemed to glaze over DE preventing anything to flow thru. Just replaced grids. Pool installer who replaced grids...

So is this dead algae or DE from filter? I'm not sure what it is? No one was in pool? & Still SLAM mode.

Backwashed yesterday, this morning, nothing black/dark on bottom. 🙂 But there was white/grey all over bottom of pool and spa. I think may mostly be DE, when I added DE into skimmer basket, I had the sock on at first. It all just clumped. So I had to mix with paint stirrer until I could get sock...

Thanks. In SLAM process now, best guess cause is well water when I top off, as even with the filter I put on hose, water still kind of murky. Also skimmer basket and skimmer sock are orangy/brown. Though both are better now than b4 I added filter. I added water today in anticipation of...

How long should i do SLAM for - as my water is clear, my OCLT test passed, and CC is .2? All the criteria to complete a SLAM is already good? so what would be suggested?

I only use pool grade DE. I added sodium thiasulfate once to lower FC a month ago (SWG high chlorine error on my part). Other than that the all I add is muriatic acid, and top off with well water, which is now at least ran thru hose filter (RV type). Oh and I have added pool salt when necessary...

From the pics would this be black algae? Dead algae? I don't see anything on walls, lights, etc, just floors

I also have mostly been using a manual spa vac, to suck this stuff up, not regular pool vac. It's quicker and easier to get most of it, so pool filter shouldn't be clogged with this stuff? And the gauge still ok, not at backwash level yet.

Did oclt, fc stayed same. Cc same, but pink seemed a slightly lighter, though is almost colorless to begin with for the cc test. Did not vac pool yest, pool floor looks worse. Last de change was April. Haven't cleaned filter yet, plan was to do so in Sept (6 mos), system is new. Will have to...