Things You'll Need
- Rubber gloves
- Bleach
- Water
- Soft cloth
- Putty knife or credit card
Instructions
Mix one part bleach with 20 parts water in the tank, filling the aquarium with the mixture. Let the tank sit for a few minutes.
Dump out most of the mixture, leaving about an inch or so in the bottom of the tank. Put on a pair of rubber gloves, and dip a soft cloth into the liquid. Gently rub down the sides of the tank, using circular motions to remove any caked-on debris. Chip off any hard-to-remove clumps with the putty knife or credit card.
Dump the rest of the mixture and buff the inside of the tank dry with another soft cloth.