Re: [APD] plywood under tank?

[Vaughn Hopkins <hoppycalif at yahoo_com>]

The only problems I see with the interface between the tank bottom  
and the stand top are:
If the stand top is not flat, is bowed up or down, the weight of the  
tank will be supported over a very small area, which could possible  
cause the bottom to crack.
If the stand top is rough, to the extent that there are protrusions  
sticking up, those could locally stress the glass on the tank bottom,  
causing it to crack.
These possible problems would apply largely to rimless tanks, having  
no plastic frame at the bottom.  When I make a stand I try very hard  
to get a completely flat and smooth top on the stand, and I notice  
that commercially made stands are the same.  So, I have never put a  
piece of plywood under my tank.

Vaughn H.

On Dec 7, 2006, at 8:45 AM, Rebecca Perry wrote:

> Hello again,
>
>
>
> Thank you to those who chimed in on the filter media question. Now  
> I have
> another – how necessary (if at all) do you think it is to put a  
> piece of
> plywood under the tank to give it full support? It’s a 29 gallon,  
> on one of
> those standard-issue pine cabinets. I’ve never used a support board  
> before,
> but I’ve also never done a soil substrate and deep gravel, either.  
> It *will*
> be extra heavy, after all, and Walstad recommends it. Not that that  
> makes it
> gospel, of course, which is why I’m asking for other opinions.
>
>
>
> What do you think?
>
>
>
> TIA,
>
>
>
> Rebecca
>
>
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