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So I am replacing the water in my spa and I read the decontamination procedure referenced in the 'how to use chlorine' sticky where it says to raise the FC to 100 ppm chlorine for 30-45 min before draining. So apparently they are using bleach in place of a product like spa purge. Has anyone...

I recently got a FAS-DPD chlorine test and the instructions say to add 2 dippers of powder. I know its better to add more than you need. But I'm curious about, Why 2 dippers? How much chlorine does 1 dipper of powder bond with? (Not sure I phrased that correctly..) If I'm expecting a reading...

We just got about 3 feet of snow and my hot tub is in serious need of a top off. Filling with a garden hose isn't an option for at least a week.. Likely more. Visually estimating it needs about 50 gallons. It's a 500 gallon tub. During the blizzard I got bored and did a ph test on the snow and...

So my water is near perfect, no odor crystal clear. But every day I see a cloudy green collection of foam in the back of the filter bucket, where the water circles down from the surface towards the filter. I've just been scooping it out with a scimmer and wiping the back of the wall. It's a 500...

I've been having a problem with ph rise recently, and did some research and determined I need to drop TA. It was around 100 ppm. I added dry acid, aerate, and continue until my ph stopped drifting above 8. I finally got it to sit around 7.8 and now my TA is 50 ppm. I've read that low TA is...

Looking for help from someone that has a kit that tests CYA and CH I have a 500 gallon hot tub, and just recently got a starter taylor kit that tests just chlorine, ph, and alkalinity. I'd like to test CYA and calcium hardness as well, so I figured I would buy the necessary reagents and tubes...

Hey so I've read the chlorine threads and ive been using just dichlor up to now and I just wanted to see if i understand the switching to bleach part.. So dichlor is chlorine+cya, and bleach is only chlorine? Also if my tub has an ozoator how much free chlorine should I maintain? And how...

Every night I've been adding dichlor up to 5 ppm fc and in the morning its back down to .5 - 1 ppm. This is ever since I refilled it after neglecting the spa for about 2 months. Also at some point in that 2 month period the circ pump died.. So new pump, drained the water, refilled. Now...

So I'm new to water chemistry and the label on my chloraid said add 1/2 TBS per 100 gallons and my tub is 500. But I used the wrong cap and ended putting about 2 oz/ 10-12 TBS in. Now my test strips show 10 ppm free chlorine. I just replaced my circ pump so my main concern is if its harmful to...

I have a spa master down east model. It seems the heater stopped working. I'm seeing no circulation or flow. It shows error codes dr which means inadequate water in heater, and ohh which means overheated even though the waters cool. The water levels fine, cleaned the filter and tried running it...