How to Remove Caulk From Aquariums

Caulk, or aquarium sealant, is an adhesive commonly used to keep the panes of glass of a fish tank solidly held together. Like all substances, however, this caulk will deteriorate over time, rendering it useless and causing potential leaks or breaks in the glass. At this time, you may wish to drain the tank and replace the sealant, but first, the old caulk must be removed. Luckily, with a few basic tools that can probably be found lying around your home, this is a moderately easy task.

Things You'll Need

  • Hair dryer
  • Razor blade
  • Rough sponge or algae pad
  • Damp cloth
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Instructions

  1. Removing Caulk

    • 1

      Start with an empty fish tank. With the hair dryer on its hottest setting, gently heat the caulk until it becomes shiny. Do not allow it to melt completely.

    • 2

      Put the razor blade beneath the edge of the caulk and peel off the caulk. The bulk of the caulk should be removed this way.

    • 3

      Wipe away any excess flakes of caulk with the rough sponge or algae pad.

    • 4

      Wipe the glass with the damp cloth, removing all remaining traces.