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I removed the top half of the Pentair Clean and Clear Plus 4 cartridge filter for a 16,000 gal in-ground and after switching to clean cartridges the black circular "cord" which fitted well around the bottom unit last time (6 mos ago) is now extended in length (somehow) by about 1.5 inches and...

i recently replaced in the above ground mounted light fixture an ARCSTREAM metal hallide lamp (online), which powers two underwater lights at deep end and one in spa. This replacement resumed the light power but when new I recall the light system changed lights colors but doesn't now. THe white...

FC 2.5 CC 0.5 CH 250 TA 125 CYA 60 The pool water is clear no issues but have stubborn black algae spots which appears in two layers. The top "biofilm" layer is shiny which (steel) brushes off easy leaving the more stubborn layer underneath the shiny layer which is embedded into gunnite floors...

Many person have admitted to "too high" CYA readings in their pool water and I witnessed a pool serviceman drain a pool with a pumping machine at very fast past. So if one wanted to drain pool water in the case of Too high CYA, a question arose among my friends concerning whether 1. to drain...

I saw a 2007 post about Borax used as algestat in pool from pool owner "Dive in the water gr8" and wondered if other pool owners have used Borax in large quantity level (50 ppm) for control of green or other algae. ? He appeared to have success. thanks

I have a fifteen year old outdoor timer which on certain days for NO obvious reason shuts off in the middle of a daytime automatic time session. The last time it shut off like this was perhaps two months ago. It just shut off a few moments ago as saw the spa water still from window. Other than...

I noticed in Pool - Chemistry a suggestion was made when increasing CH to use either of the following (which is cheaper than Leslie's Calcium Harness powder sold in 4 lb jugs. Pelalow, Dowflake, Tetraflake, or Tetra 94. If so has any one tried these and if so what dosage was used per 1000...

Will draining the spa down 50 % or more for cleaning out dead algae in any way cause a pop out ? Spa is of gunnite construction built attached and along side pool.

Just a general question if all US "algaecides" are all made by the one manufacturer, why is there such a variance on eBay / amazon for a one qt. bottle from $ 18 to $ 55 + ? Just wondering any insights appreciated.

My 16,000 IG gunnite pool has in last few days been turning cloudy and we were hit here in SE the last 2 days two days with steady rain just stopping today. Using the just arrived TF - 100 kit I have since the rain started lite green pool water sorry no pic but looks similar to pic on pool math...

In case you are interested (not) Dollar Store sells a jug of bleach called "The Home Store bleach" (96 0z.) for $1.00 each per jug + tax. Jug contains only 3 % sodium hydro chlorite and does not have that standard sweet bleach smell or yellowish color. Also the % is not listed on label which...

As an alternative to "hold the hanging sock in front of return jet" can I fill the sock then walk around the pool squeezing the sock until all powdered sediments have dispersed from the sock into pool water? i haven't yet found a way or technique as above to secure the sock to the return jet.

Can an experienced person advise whether to get the taylor K - 2005 or the TF - 100 Kit? Not sure from product descriptions if either will test for CYA ? thanks

EDIT: Please don't hijack. I have moved your post to it's own thread. C3ClCn303 when you "hit it with elbow grease" was this below the water level or submerged the in water, I too have some stains and wonder if I can scrub submerged or only if water level is lesser. thanks

I recently obtained the supplement kit including R 0870, and R - 0871 for for FAS/DPD chlorine drop test BUT instead of storing at room temperature instead left powder (closed) on patio table under canopy not in sunlight for three weeks before realizing should have kept inside at room temp...

ph 7.8 Alk 120 Stab 50 FC 2 CC 1 I have traditionally gone to pool store for this test but was wondering if anyone knew the Taylor R # and procedure for testing hardness on my own? Last reading was on july 1 : 60 and Leslie's says "too Low" thanks

ph 7.8, Alk 130, Stab 50. FC 2, CC 1 Has anyone had any experience purchasing Vitamin C (ascorbic acid) tablets and rubbing them against the pool wall or floor to remove pool stain spots? thanks 63 john

16000 gal gunnite pool with the following details today ( has been showering everyday for last 8 days in New Orleans area) pool details today are Alk 120, ph7.6, FC 4. Added (noon) 1 lb 73 % to pool (16K gal) and water slightly cloudy for past few hours now 6:30 pm). Will the cloudiness clear in...

I have a 16,000 gunnite pool (east of New Orleans, La) and 'far' skimmer pulls water from Kreepy Krawler stronger than 'near' skimmer does. could the near skimmer underground PVC be clogged or is there any other reason? Any idea how to unclog? Would a water suction pump (out) do any good?

fifteen year old 16 k gal gunnite pool S Louisiana no major problems over years since Katrina when had to empty / refill. have spots on pool floor which are not of black algae origin. Have submerged self long enough to scrap the spot surface and unlike upsetting b. algae spots the 1 inch...

Any had this happen : Water pressure normally 27 psi then when switch pool value for pool cleaner to circulate pool from far skimmer WP reduces to 14 psi.

Re: bleach vs shock ?? To manually rid the pool walls of black algae spores, does it make sense ( i was told this) to put Vitamin C tablets in a white sock and scrub the walls ?