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I always understood the main issue was CYA build up over time and the only way to reduce CYA was to drain water and replace it. For the last 10 years or so our pool has had a CYA of about 40 - 60 (best guess as the test is not really easy to read). We did liquid chlorine in the summer (swim...

I am considering adding a SWG to chlorinate the pool (currently I use liquid chlorine) but am a little concerned about whether they could cause issues with the Sunearth EP-40 Panels I use to the heat the pool As you can see from the panel specs they have copper internal piping and I wonder if...

I have a new Jandy Check Valve installed to stop backflow into my solar panels when the solar isn't running. It is on the return line from the solar panels. I see some reverse flow coming from the check valve - not a lot but definitely some. Is this normal or should the check valve stop all...

Last year my CYA was between 30 - 40. In Northern California I switch off the solar and run my pump at low speed during the winter months and use tabs to maintain some chlorine in the coolish (`40-50F) water. We normally get a lot of rain in the winter months (1700' in the Santa Cruz Mountains)...

I am using a Suntouch Controller to control my solar heating. It works fine most of the time - but sometimes seems to turn off when water temperature is below the taget and solar heat is available. I have it set for default Heat Start Differential 6 degrees and Heat Stop differential 3 degrees...

Using a TF100 I have been reading my CYA at around 45 ppm. Every is going well- I adjust to about 6ppm FC each evening and the next evening FC is down to about 3ppm - then I adjust back to 6ppm. Anyway I thought I would double check the CYA reading by buying the 50 ppm CYA sample. Well big...

I have never really known our pool size in gallons - the pool was there when we bought the house 14 years ago. It is an 30 x 15 ft kidney shape - with round 8 ft deep bottom - small shallow end which quickly gets deep. Recently I have been guessing it is about 15000 gallons using various pool...

My CYA is about 45 so my minimum chlorine level is 3 - 4. I add liquid chlorine each evening after testing with an TF100. Up to now if have been trying to add chlorine to get to 5 - 6 so it is back to 3 - 4 the next evening. Everything seem OK with bright clear water but I am now wondering if I...

I have a TF-100 and am very happy with most of the tests. However I find using the OTO PH test to be somewhat of a guess. The block seems to go from orange thru red to purple. However my test samples always seem redder than the block. Most the time I think I am somewhere in the range from 7.5 -...

Follow up to a conversation started in this topic. JasonLion I just saw this post you did in January - I wonder if at 1500 RPM if I have enough pressure to keep the vacuum valve closed - how would I tell?

I found this post from 2009. Are these Watt numbers a good estimate for a VS3500? Will the Watts be constant for RPM or do they also depend on the GPM (that is do they vary depending on back pressure). I am trying to work out the best settings for a new VS3500 install. Also is there a minimum...

I have just had a Suntouch + Intelliflo pump installed today. I am finding the set up and manual a little confusing. It looks like the guy who set it up set up two schedules Low (for the filter pump) and Aux 2 for the cleaner booster pump. He also set up 3 pump speeds Low (Solar not running)...

I have a refurbished Coleman spa with wood cladding on the outside. It is is very nice condition and I want to treat the wood to keep it that. Any recommendations on what to treat it with?

I think I read that you can use the TF100 FC test for bromine as well and the conversion ratio is 2.3 (or 2.25 or 2.5) x FC = bromine ppm (but I can't find the posts now). So I should multiply the number of drops by 0.5x2.3 to get the bromine level? Is this correct? If so then I should plan to...

This stains were there when we bought the house - and stayed constant - neither getting better or worse - over last couple of years. The pool is 8' deep at the drain. Water is well water and adds a lot of alkalinity when topping up the pool. What is the best way to identify what type of...

Which kit (TF-100, Taylor K-2006, Leslie's Chlorine FAS-DPD Service Test Kit or variants thereof) would be best for testing a pool (chlorine) and hot tub (bromine). I'd like to get one kit that will do a good job on both. Note I use well water to fill both. The well water is 'filtered' with a...

I am interested in the comments that the Hayward Tristar energy efficient version uses less electricity and is quieter - do you have data on how much less electricity? I am looking at replacing an old 1HP (at least 10 years old pump) - not sure what the pump is but the pump motor information...