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Do I need to install a valve to prevent water flowing back to the pool whenever I open the pump basket, or is a valve not necessary? The instructions for the pump say to never run the pump without water: Here is a thumbnail picture of my pump inlet with a ruler: Whenever I try to clean my...

Pool was replastered, and today (Dec 14) is 13 days after the 2-day fill ended. I am trying to follow the NPC guidelines, which the plastering company approved of, regarding brushing and balancing. My main concern is to prevent any problems/damage to the new plaster, especially maintaining a...

Finished SLAMing and am starting normal maintenance. Some questions: 1. For the CH test, I see the color change from red to purple, and after a few more drops it seems less purple and more blue. Do I stop when the red changes to purple, or when the purple changes to what I guess is blue...

I am in the midst of a SLAM procedure for a ~2-yr swamp, but now that all the heavy muck is gone and I can see the main drain easily (still cloudy though), I see dark mottled stains on the bottom and what looks like accumulation of stain at the rounded areas at the bottom of all the walls. Looks...

Basically a newbie with SLAM/CYA/Cloudiness problems. Brief history: Started with an many-months-old (ok, then, 2 years) swamp due to filter failure and slow repair of it. Layer of leaves and algae on bottom for a long time. I repaired the filter and installed a vacuum to waste valve between the...

When doing the Chlorine Drop Test today, I get a definite delay in getting any pink color during all stages of the test. After adding the R-0870 powder, first it was no pink, then as I was doing something else for a few minutes, it began so show faint pinkness. So I started dropping some R-0871...

Situation: Moved into our 60 y.o. house with pool (we've never had a pool) last summer. The Pentair DE filter, which has had a frozen backwash valve since day 1, soon after blew an o-ring and has been out of commission since then. Pool became a swamp complete with amphibians. I am repairing the...

I've read quite a few posts about this, but I still have questions (pool came with newly purchased house; I've never had a pool). For the very fine dirt/dust/whatever on the pool bottom (it looks like brownish/reddish dirt to me) that becomes a cloud when my leaf net scrapes the bottom, what is...

Symptoms of my STA-RITE heater (model SR400NA) at my recently purchased house (I've never had a pool): - POOL ON button usually does nothing when pressed, but if pressed about 50 times the machine will turn on with a 63 in the display (burner ignites and warm water coming out of return at...

Wow, I am so happy I found a forum of helpful, friendly and knowledgeable pool people! I have many questions, not only about getting the pool back in shape, but also about my pump, filter and heater (which I hope you can help me with later). The basic situation: I've owned the house about a...