styrofoam under tanks

[Myka]

Fwiw, the foam comes in pink, blue, or purple depending on brand. I have all three colors. As long as it is rigid styrofoam you're good.

This is what it looks like (these are small pieces):

[kole]

Originally Posted by The Grizz

This is not good, you deffinately want to have plywood then foam to support the WHOLE bottom pane so it doesn't crack.

Got the correct foam now thanks Myka. Grizz why do you say this? I had to replace a front pane of glass in a 125 and if I remember correctly the sides were sitting on the bottom pane. It was a while ago so I may be mistaken. I thought it would only need to be supported by the outside edge as with other tanks.

[Myka]

I use 1/2" rigid styrofoam under all my tanks, I don't like to use thicker stuff. Sometimes I have to look around to find it with straight edges instead of beveled edges, but I can usually find it at Home Depot. The stuff I buy is Owen Corning "Foamular". I like the styrofoam to stick out around the tank about 3/16" all around, so since your tank is 24" wide I would cut the styrofoam down the middle of the length and leave a little gap in the middle so it can stick out all around. Using plywood helps to strengthen the stand if there is any doubt, but usually is not needed if the stand is well built and the edges line up nicely. Although if the bottom pane of your tank ever breaks the plywood helps to hold the water in a bit while you're panicking to get everything out.