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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...

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...

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...

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...

I have a 24,000 gallon heated, indoor, gunite, commercial pool currently sanitized with bromine tabs via an offline feeder. It has been brought to my attention by several of the experts here that using bromine tabs over time causes a build-up of DMH which reduces the effectiveness of the...

I currently have a heated indoor gunite commercial bromine pool at work and will be changing the water out in about 3 weeks and I am considering changing from the off-line brominator that I have been using to something else to sanitize and would appreciate some suggestions. I would like to...

Not sure this is the right thread for a UV light question but seeing as it has to do with sanitation I thought this might be the right one. I was told in the past that the addition of a UV light would be helpful in keeping my CC under control due to the fact that my pool at work is an indoor...

I had a thread about a year ago that answered most of the questions I had about converting from bromine tablets to SWCG for my indoor pool at work, but at the time I had just replaced the water and already began feeding bromine tabs and there was already a significant build up of DMH so I...

I have a 24,000 gallon indoor, gunite therapy pool in Massachusetts. The water readings are tested 4x/day with the taylor test kit recommended on this site. Recently our water has began to get cloudy and I can't seem to figure out why and I am wondering if I am not getting enough filtration...

I have a commercial, indoor, 24,000 gallon, heated, gunite pool in Massachusetts. The past several days we have been having cloudy water with a green tint to it and can't seem to fix it. It started with one of my employees forgetting to shock when the levels were very low (around 1ppm) of FC...

Just opened my pool about a week ago in Massachusetts. It's a SWG and the pool company opened. The water was pretty clear and blue (other than some debris on the bottom) after the safety cover came off and they did the standard adding about 5 gallons of liquid chlorine and some algaecide. The...

I have an inground, indoor gunite therapy pool at my business. (Please disregard my signature at the bottom as that is for my pool at home). Recently, there has been yellowish staining along some of the walls and near the deep end that does not seem to brush off. The indoor pool is...

High Phosphates What should I do if my phosphate test came back over 2000ppm? I have all the other chemistry in-check as recommended by the pool school. FC = 4-4.5 (mostly, does dip into high 2's on occasion) CC = 0 PH = 7.5 TA = 100-110 (which when I do the CA conversion I think it puts it...

Does anyone have any thoughts on the Dolphin Triton Plus Robotic Cleaner? I wanted to purchase one for my 18' x 36' vinyl pool and also to use it in the off-season for my indoor gunite pool that is 16' x 46' x with 6' deep end and wanted to know if it was a good brand or would do a good job...

I read on one of my testing kits that the ideal temperature to get an accurate reading for CYA is between 70-80 degrees Fahrenheit. It said that if the temperature of the water is above that then it could artificially lower what the CYA levels are when you test and, in fact, your CYA levels...

If I keep all of my chlorine/CYA levels in check do you still need to add an algicide when first filling the pool and weekly like most of the labeling on the bottles say? I typically use the algicides that do not contain copper for my outdoor pool, but just wonder if they are actually needed if...

I have an indoor, heated (93 degree) pool in my fitness center. This is different from my residential pool that my signature indicates. I am considering switching my indoor pool to a SWCG but would like advice for making the switch. The indoor pool is 24,000 gallons. I just recently changed...

New pool (2 months) that has hayward aqua plus with t-cell-15 for up to 40,000 gal. I also have a nature 2 sanitizer for 25-35,000 gallon pools. My pool is about 26,000 gal or so. My understanding is that by using the nature 2 it allows you to run your chlorine generator below the usual...