Recent content by dmccarthy

I understand the TFP recommends a CYA level between 20-30ppm for an indoor pool and the reason would be different than protecting chlorine levels from UV rays.. Mine is commercial indoor pool used for therapy. Temp: 94 degrees Sanitizer: liquid chlorine via Hayward controller direct injection...

Great thank you I will try. If for some reason I need to keep the TA at a minimum of 80 (state regs) is there a different ph I should be shooting for? 7.6, 7.7? Thanks,

Thank you, Yes the CO2 injection is used to lower the pH in place of an acid injection system. I will check the TA of the fill water this week and it sounds like the best solution would be to temporarily suspend the CO2 injection and use muriatic acid to lower the TA and resume once it is in...

Also, failed to mention I have not checked the TA of the fill water (town water supply) which we add 1-2 inches of water/week especially after backwashing which could be contributing.

Please see below for the specifications of my work pool. It is all automated and have the pH set for 7.5 and ORP is currently set at 675mv (jumps up and down a little depending on bather load at the time) and that seems to keep the free chlorine levels right between 2.0 and 2.5 ppm give or take...

Thank you for the replies. I will order those reagents and see if we are holding cc below .2. If I remember correctly I believe someone said that the 2-stage SeaKlear PRS clarifier (which we have) can also help a little bit if we are having issues with cc as well? Thanks

Thank you for the replies. As far as our state regs, yes FC needs to be between 1-3ppm and CC is supposed to be below .2ppm. I did install a UV-lamp when I changed the water out last month (paramount 2-lamp system that supposedly handles up to 90gpm as our flow runs between 60-70gpm, so I am...

I recently purchased a Hayward CAT-4000 ORP/PH controller for my commercial, 24,000 gallon indoor pool. I will be installing in the next few weeks once the electrician wires a GFCI outlet and I am going to be using a 15 gallon stenner pump for the chlorine and I have secured a local gas company...

thanks for the info. That does not seem like too much trouble at all and I would rather do that than be fooling around with gallons of muriatic or HCL to adjust the pH.

Thanks for the info, that makes a lot of sense. Especially since I have a lot of elderly who use the pool and many of them have various skin sensitivities due to a lot of the medications they take so anything that would bring a bit more comfort would be helpful. I am going to make one last...

Thank you for the info. That would make sense to have the sensors on a regular replacement schedule if I decided to go that route and not wait until one fails. Currently I have a back-up replacement motor in case our pump ever goes which they seem to do every few years running constantly. We...

Sorry meant CO2 not O2..typo. Would prefer CO2 vs muriatic acid to control pH, but open to suggestions for or agianst either. I have a small filter room with a gas heater and would rather not have liquid chlorine and muriatic acid in the same general area or potentially 2 competing liquids...

Just changed out the water in my 24,000 gallon, commercial, gunite indoor pool which we were previously using bromine tabs through an off-line automatic brominator. For a lot of reasons (the most being the accumulation of DMH over time). I also just installed a paramount UV-sanitizer sized for...

Anyone have a particular UV light they would recommend? It is for a small (24,000 gallon) commercial indoor pool that currently uses bromine as the sanitizer and has issues with CC over time which I am looking to reduce. I understand it may cause a slight increase in bromine/chlorine demand...

thank you very much!