help with a divider please!

[froggsong]

it would work well until the silicone decides that it will no longer be party to the pairing you have chosen for it. The it will simply peel away (all by itself), and you will be left with a watery mess... Been there, done that, got the coffee cup (the t-shirt was too expensive and didn't come in my size).

[viva la viv]

just thought i'd throw this in here a good idea for barriers when you want water to flow through but no fish to get through is a plastic mesh called plastic canvas used for bead crafts it works perfect for seperating your filter in a false bottom tank also good for attaching moss for a moss wall you guys prob all knew this though..

[viva la viv]

I have no links but if you just type in plastic canvas in your search engine you will see a pic of it that will give you the basic idea alls it is, is a flat sheet of plastic that looks like a net its not brittle like egg crate so you can form it around pumps and corners and the hole size is perfect for letting larger particles through and still keep out fish

[brymanda]

I used plexiglass and aquarium silicone and haven't had any problems so far. It was recommended in a book I read. But I also cut the plexiglass a little large and wedged it in so that it was curved and not straight across. It was easier to seal that way. I then used a bunch of pond rocks and aquarium-siliconed them together to make a gentle ramp up to the top of the plexiglass and then filled in the rest of the water area with the rest of the pond rocks. I think I let it all cure for about 48 hours before adding water.