I just refilled my hot tub yesterday. It has begun developing a dark ring green today. Chems check fine...?

Question

I checked the pH, bromine and overall alkalinity...within OK ranges.

Answer 1

change ur filters and or clean them with 1/2 Clorox and water! then get u a bromine tablet float that holds 10 or so tablets at a time and throw it in. turn ur pumps on and let run... will take about 24 hrs.....may need to remove 1/2 of the water already in the spa.

Answer 2

I had this exact same thing happen to me. It is very frustrating because I cleaned that tub so well that it sparkled before I filled it back up w/water. Then 3 days later, while the chemicals were still in perfect balance, I had an algae film all over the tub under the waterline. The walls and seats were covered and the water absolutely reaked. I could hardly stand the smell long enough to keep testing the water and wondering what to do since the chemicals were all in perfect balance. I shocked the hec out of it w/Bromine but that did nothing (except throw my chemicals off, of course). Finally, I went and bought Algaecide from the Pool and Spa store. I could not find anything that was especially for spas so I bought the one made for pools and used a very little amount at a time. I kept increasing the dose every other day to make sure that I didn't over due it. The spa cleared up within the week. But now I have a $13 bottle of algaecide which I've used about 4 Tablespoons out of! Oh well, it was worth it because I was really frustrated with the situation.

Answer 3

What did you clean it with before you refilled it? Mine said to use something like 409 Spray after it is empty. After thoroughly cleaning it AND THE FILTER, then I refilled it. I had no problems when I followed their directions. You could contact the company that sold you the spa.

Good luck.