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FL1 code flashing. Circulation pump works well and flow valve opens and closes as it should. Pump 1 (2 speed) hums but doesn't move water. It's not seized. Troubleshooting yielded no results. Called tech and he recommended new board and replace pump for $1200. Ouch! Obviously I'm looking...

Klean-Strip 1 gal. Green Safer Muriatic Acid-GKGM75006 - The Home Depot apparently, based on the reviews: This stuff will work however you will need to use twice the dosage. Most muriatic acid dosages are based on ~30% concentration of acid, this stuff is ~14%. It will work just be aware its...

Good morning, I received my 2 gallons of muratic acid. It appears to be a construction grade, designed for cleaning tiles. There is nothing on it about pool use or % or active ingredients. Is this going to be ok to lower my pH? I don't want to add anything without checking with the experts...

Good morning, I clean and disinfect 2 hot tubs. We use bromine. When draining/refilling or topping off we use non-chlorinated water. Today, I used a chlorinated water source (<1ppm) and the water turned amber... almost yellow, but more golden. Is this what happens when chlorine and bromine...

Thanks guys. The pH of the water coming out of the tap is 7.5. I want that to be my goal for logistical reasons. It's not plaster, just concrete. So the question is, add acid or let it settle back on its own over time? Chem question: Everything I've read here says that baking soda will...

A self inflicted wound? How can that be? I went to pool school! :-) My inclination is to let time heal the wound. Is there a downside to this? Where is the, 'pH is now x.x, I need to add acid to bring it down,' line in the sand? Thanks.

Aloha, Crystal clear pool!!! Thanks experts. CYA 40, FC 4-6. Easy to maintain. Haven't added anything since the water replacement. No nothing, but calhypo tabs. pH has been in the 7.4-7.5 range. CH 250. TA 50. Seems low, so I add 40# baking soda (over 4 days). Now TA 80, but pH has...

Help me DE to sand filter Split by moderator from HERE. jblizzle I'm doing this today. Pump 1 and 3 have skimmer baskets at the water line. #2 doesn't; it flows from the bottom drain. Any suggestions for adding DE 11 feet down? Thanks, Mike

Good morning, Is this the right stuff? Amazon.com : Robelle 4024 D.E./Diatomaceous Earth Powder for Swimming Pools, 24-Pound : Pool Supplies Chemicals : Home Improvement Does anyone know where I can purchase the right stuff but in smaller quantities? Thank you, Mike

Thanks. Just a clarification: If I use unstabilized chlorine pucks (3" tabs), am I adding cya?

Good morning, When (if) I get my cya down to 50ish, I want to experiment with this process. I can get a 53 gallon drum of 12.5% liquid chlorine for $193. It doesn't come with a dispenser, so I'll have to rig something. Any ideas are welcome. The state laws don't restrict hand feeding. This...

Good morning experts, Everything I've ever read ( on the side of bottles, mainly ) advises to not re-enter pool if the chlorine levels exceed 5 ppm. Yet the cya chart advises a fc level of 7.0 with a cya level of 60. What to do? Thanks, Mike

Thanks for the replies. Mike

The articles in pool school reference residential pools. Do the same rules apply to commercial pools? We are open 24/7 and I'd love to convert to this method of care. I'm just concerned about the disclaimer. Also, is there a sub-forum on this site dedicated to commercial pool care? Thanks, Mike

Thanks. The superchlor granules are calcium hypochlorite 65%. I don't think this is stabilized. Please correct me if I'm adding to my problem. The test kit is a Taylor. I don't know the number. It's housed in a large blue box. I use 5 drops of reagent #1 followed by 5 drops of reagent #2...

Good Morning, Cloudy water, high chlorine use, read pool school, tested cya (off the map high), diluted pool water over past week, pool clear, fc still zero, cya (with 50% diluted sample) 200.... oh yeah, cannot close pool to slam. Stopped using stabilized pucks and have been adding 65%...