You see the tank of your dreams and the person selling it tells you its sprung a leak. You buy it cheap and decide to fix the leak... Well lets get started.
What you will need:
1. Bottle or tube of 100% silicone, your able to pick these up either at your local HD
, or your nearest Home Improvement Center.
2. Razor Blades (caution very sharp)
3. Bottle of Rubbing Alchohol and cotton swabs.
Ok you have every thing you need so lets get started.
First you will need to fill the tank so you know where the tank is leaking. Gradually fill the tank (outside so you dont get a mess inside) filling it slowly will help determine better where the exact location of the leak is.
Second empty the tank and leave to dry. Take a razor and slice down the middle of the silicone press firmly it will be fairly difficult to remove. Then take the razor along the edges firmly and peel the silicone away. It may flake or crumble. Remove all the silicone above and below the leak about 3 inches. Make sure you remove the old silicone as good as possible and try to remove as much from between the 2 panes of glass as you can.
Third you will have to clean the area that the new silicone will be applied. Either use a vaccum hose to suck chunks from the area or wipe extremely well. Next take the rubbing alcohol and dab the cotton balls and wipe the area generously. Use a dry towel to wipe after. Repeat this a few times then let the rubbing alcohol dry and evaporate.
Fourth apply the new silicone to the seam use a decent amount and dont be to stingy. The silicone will begin to become very sticky in about 2 minutes so you will need to be quick. Next use your finger and rub it along the silicone lightly. Rubbing your finger will help spread the silicone along both sides of the seam and give you a better look. When appling the silicone to the already exsisting silicone (the old that you didnt cut out) apply it over the top of the old and smooth it flush. This will ensure that you dont have a seam that would be weaker between the old and new silicone.
Now all you have to do is clean any excess silicone that may have got onto the glass or smoothing the seam a little. Just use a damp cloth or towel to do this. Now just leave the silicone to cure, it should say on the silicone bottle of the cure time. Usually around 24-48 hours.
This is what i have done for resealing tanks and hasnt failed me yet. HTH
all of you! Good Luck.