Rigid insulation between tank and stand?

Hey all,

I'm getting ready to setup my 50 gallon reef and get it going. I need some advice. My stand was purchased from my LFS and its high quality however when my SeaClear tank sits on top of it, if I push down on opposite corners there is a very MINIMAL rocking movement. I mean I cannot even see the gap. It's that minimal.

Just to play it safe I was considering picking this up and cutting to fit the base of the tank between the stand and tank to account for any inconsistancies. What do you all think?

R-Tech 1/2 in. x 2 ft. x 4 ft. Insulation Sheathing-310866 at The Home Depot

Is there anything else you would recommend?

Thank you!

 

or how bout some 1/4" cork underlayment?

http://www.homedepot.com/p/QEP-100-...Down-Wood-Floors-72003/203498861#.Uce6mJwsZsE

 

A piece of styrofoam works well.

 

We use styrofoam insulation just like in the link. The thickness depends on the tank size. I'd use at least 1/2", and 3/4" for larger setups.

 

for a 50 gallon 1/2"??? That seems like a fairly massive block of styrofoam. I was thinking 1/4" or 3/8" at most

 

I had that same situation with my 40B and used another brand of very similar product. Worked great.

 

I use 1/4 styrofoam on my 55g.