They dissolve too slowly.

We have been using the bromine tabs from Walmart for years. I put 6-8 in the float for our tub and hey last about a week. These tabs were in the float for 2 weeks and showed no sign of dissolving. We had to change the water twice to get the tub clean again. I guess if you have a float that holds 2 dozen tabs they might work, not practical for a tub.

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