Unlevel floor for my 225 gal

[Acro-Phobia]

Looking for help on leveling a stand that is not on a level floor.

It's a 225 gal custom build (72" X 30 " X 24" high). The floor is tile over concrete slab. Over the 6" spanse on the tank, the floor drops away from the base of the stand by about a 1/8" to 3/16" drop in the middle of the tank then back up to level at the other end. I'm worried about the stress on the tank with that much of a gap between the stand and the floor in the middle of the tank.

Am I stressing too much or do I need the brace the middle section of the stand so that it can't bow down in the middle?

If so, I need some options on how best to do that.

 

[asm481]

If it was me I would be shimming it. Small job now to save some worry. Get the plastic shims made for toilet bowls. Is your stand bottom legs or one long horizontal piece? If horizontal I would shim it level then fill in gaps every 6-8 inches till it is all solid. Recheck level as you fill the tank. I fill a third, check then at 2/3 and again about full.

 

[Acro-Phobia]

The bottom is one long hoizontal piece. I had heard that the blue foam board was acceptable also. Have you ever used that? I assume I biuld up the area where the gap is over the floor and the stand with tank and water will squeeze it down and create a solid foundation. Does that sound right.

 

[asm481]

I don't believe the foam will compress right. If you see the gap, fill the gap--pretty simple.

 

[Acro-Phobia]

Yeah, it's pretty visible. I need to move the stand to get the tank on. Can I shim it after the tank is on it.

 

[asm481]

Definitely put the tank on then shim. I don't even trust a level on the top trim at that point. I measure the water height as filling at all four corners and adjust accordingly.

 

[Jflip2002]

If you get a wavemaker, you'll never be able to tell lol

 

[Acro-Phobia]

Not really worried about the top of the water, just the whole thing trying to settle in the middle. I think the top level will be less than a 1/4" and won't be visible. I can adjust the levels of the overflows with acrylic plates so they draw water at the same hieght and rate.