For safety's sake, I'd keep a brace. If your tank is glass, you'll have a hard time getting plexi to stick to it. On one of my tanks, I removed the centerbrace that was part of the plastic rim, and siliconed a 1/2" thick piece of glass inside the tank. It worked out very well.
My tank is a 90g all glass older, it has thick glass but not quite 1/2
inch. Could In cut the old plastic brace out and leave enough room to
glue or screw on the plexiglass in place of the old brown plastic. The
reason is I want to put a 250w mh over the middle. thanks
The heat from a metal halide isn't going to go well with plexiglass - it will have to be considerably above the plex. I'd go glass for safety. It's not expensive, the piece I had cut was 3/8" (not the 1/2" that I previously said) x 6" x 12", and it was something like $13.
I cut my brace out and replaced it with a piece of plexi that is the same thickness. I left just enough of the old brace drilled 2 holes on each side and used plastic bolts and nuts to secure the new brace. I am pretty sure that there is an old thread on this that has pics of tanks done very similar to mine. So far it has worked great.
Jason&Andrea Townsend Bluffdale Utah Tired of looking at my empty 125 :(
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