Things You'll Need
- Silicone sealant
- Second tank or suitable container
- Single-sided razor blade
- Tape
- Paper towels
- Rubbing alcohol
Instructions
Run a dry finger along the seals on the edges of your aquarium until you feel water; this is where the leak is.
Wipe the glass dry with paper towels. Tear off a piece of tape and stick it to the glass as a marker of where the leak is.
Remove your fish, filter pump and heater, and place them in a suitable container with some water from your leaking tank.
Remove the water from your leaking aquarium until it is a few inches below where you found the leak. Dry the area with paper towels so that there is no moisture left at all.
Look for where the silicone is damaged inside the tank, using the tape you stuck to the glass earlier as a guide. Scrape away the damaged silicone until the area is clear, using the single-sided razor.
Clean the area with rubbing alcohol to ensure all the silicone sealant is removed. Dry the area with paper towels again.
Apply fresh silicone sealant to the area you've just cleared. Allow the silicone to dry for 48 hours.
Refill the tank completely. Do not put your fish back in until two hours have passed, to ensure that the leak is completely repaired.