Scumbug Turned Yellow?


Well-known member
Apr 28, 2012
Houston, TX
I put a new scumbug in recently after a partial water swap and filter change, and it turned yellow. The only chemicals I've put in since the water swap (about 100 gallons on a 400ish gallon hot tub) have been dichlor and muriatic acid. Anybody ever hear of something like this?

I only swapped out some water to bring the temp down some. It's too hot for a hot tub in Texas in the summer IMG_20180607_171450.jpg
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