Friday, June 1, 2007

Sealing a tank

The sealing compound of mastic is often specially made to remain soft for two months. If the glass of the empty aquarium gets shaken away from the metal frame, during a journey for example; the internal water pressure of 10 Ibs per square inch will tend to push the soft mastic into any gaps that may have been caused and so to re-seal a leak. Once the water has been put in, a leak that is no greater than a drip will stop of its own accord as the mastic is pushed into position gradually over twelve to forty eight hours, provided the rate of the leak does not increase.

An aquarium full of water should not be moved, or it will be seriously strained by the internal water pressure.