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Re: Shocking with bleach instead of MPS - Have a few questio Thanks Chem Geek. I added baking soda to get the pH and TA down. The latest numbers are: pH 7.6, TA 50. The water feels much better, so I'd consider that problem solved. The bromine test now goes completely colorless, so I'm going...

N.B. Using 3 step bromine system. 370 gal tub. Testing with K-2106 test kit. First question, for those that use MPS to shock/oxydize your tub, how much are you using and how often and how long before it is safe to go in the tub? The instructions on my container say 125g/fresh fill per 1000L...

thank you chem geek. :-D i did go to my local pool/spa place and they'd never heard of adding borates or boric acid to help stabilize pH and he said they didn't carry any product that would do that. i peaked the sales guy's curiosity though because he said he was going to google it as soon...

I think I did have to up the pH once in a while, once i got my tub going and if MPS has that affect, then that would make sense. I don't remember having to lower the pH, once I got it balanced. I'll pay more attention this time around. I understand so much more then when I first started. I...

To answer your question Greg, I have a brand new tub and I think it circulates the water enough without having to turn on the jets. I'm sure diluting the chemicals first is key though. Thank you for being patient and answering all my questions. This is great information and all my questions...

Thank you Greg, I think I understand now. Yes, my TA is fine and I don't want it any lower. So if I only want to lower my pH, I will add the dry acid diluted in water to the tub and I will just let the tub circulate it without turning on the jets or air blower. Correct? How long should I...

So I just checked my tub after running the jets and blower for 5 minutes and my pH is now back at 8.0 and my TA is 50. How can the TA be so low and the pH have risen so high? I assume this means I need to focus on lowering my pH with acid to 7.0 and the aerate to raise pH? When I add the acid...

I have a 370 gallon spa with jets and a blower system. I sanitize with 3 step bromine, using MPS to shock. I use dry acid because that's what came with my start-up kit and it's what I used the first time I filled my tub. This is only my second time filling the tub, so i'm still learning. I...

Yes technically a TA of 90 is ok, but I thought pH of 7.8 to be high. So that is why I'm trying to lower TA to get the pH lower. "A Total Alkalinity (TA) level of 90 is fine... and will eventually come down further without any action on your part." I'm not sure I understand how this would...

Hi, My pH is stuck at 7.8 and my TA is 90. I've read Nitro's guide to lowering TA without affecting pH but it confuses me. I know I need to focus on getting my TA lower with dry acid. Say around 60, to get my pH right and stable. What I am not sure of is do I add the acid and aerate (turn on...

No, I don't think so. I haven't actually been in the tub, since it's neglect, so i wasn't able to feel for slime. Unless it's something you can see. The water is just really dull (the best way to put it) and it's foaming like crazy, which I could blame on the pH because it was really high...

Thanks Chem Geek. That makes sense. Could I also just shock the Crud out of it with MPS to kill any bugs? Or do I need to do the bleach method? Michy

I let my tub go for a week and now my bromine is at zero, the water is dull and it's foaming like crazy. The pucks in the floater were stuck at the top, and not releasing the chemicals. I've seen Nitro's decontamination procedure but it is for chlorine. So far I've shocked it with MPS and...

oops, I meant the 10mL sample gives 12.5ppm (10 x 1.25)

If I compare the test results using the 25mL sample and the 10mL sample they are not the same. For example the 25mL sample give a result of 8ppm (16 drops x 0.5) and the 10mL sample gives 12.5ppm (10 x 1.125). I prefer to use the 25mL sample because it's easier to swirl but i can save on drops...

I got my Taylor test kit today and here are my results: CH: 200 TA 120 pH 7.8 Bromine 12.5ppm So I added acid to drop the pH down (I realize this will lower the TA as well). I am using a bromine floater and I just did my weekly shock two nights ago. I need to wait until the bromine is at 6...

So we were 4 people in the tub for about 40 minutes and I figured to put 4 tbsps but put in 5 tbsp of bromine granules just to be safe. Was that right? Anyways I checked my bromine levels the next day and they were through the roof - over 20ppm according to my test strips. The day after they...

This is great info, thanks so much! This is my first spa and I'm still trying to figure it all out. It's been a little confusing, because I'm hearing different things from the manufacturer, the stores and the forums (this forum has definitely been the most helpful) I don't like playing...

I use a bromine floater and also add 1 tbsp of brominating granules (85% sodium dichlor, 15% sodium bromide) after each use. (2 people for 15-20 minutes) Adding the granules after use was recommended by the vendor as well as another pool store to keep the bromine levels constant. So far it...