hey thanks for the advise and the link to your site.its a great site and exactly what i was looking for.anyway,i have seen a few ways to make a false bottom,but the idea i have in mind for my vivarium design,the floor is very uneven.i was wondering if i could get away with a simple falsebottom using only gravel.id shape the gravel the way i want,then cover the gravel with a screen or something to keep the substrate from seeping into the gravel.then place substrate on the screen.i would then drill holes in to floor to drain when i needed to.i assume a layer of water would accumulate in the gravel,so id be able to place a pump in that layer for waterfall ect.id prob. place the pump in some sort of container with holes punched in it so not to suck up junk.so will this work? if so then why all the extra trouble of laying pvc down ect?.isnt that just extra work for nothing?.oh yea,i have read that silicon is for sealing glass,but i wanted to make mine of glass but use a plexiglass floor so i can drill easier.can you seal glass to plexiglass with silicon?should i just make it all from glass?

