Paint in the tank.

Doomhed

Large Fish
Feb 11, 2003
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Rhode Island
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#5
I used to use plastic-coating type things as paint for inside tanks and for fixtures. They had it at pool/jacuzzi supply stores and was used to coat water tanks on the inside and outside. I had to read the cans and pick accordingly.
 

Orion

Ultimate Fish
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Feb 10, 2003
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Kentucky
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#6
If you don't use what Doom is talking about, then you'll have to seal whatever paint you use with a safe clear epoxy. If you seal it, you really could use any type of paint that you wanted, however just be sure that it is sealed well and water won't come into direct contact with the paint.