Hi folks-
I'm in need of a little help here. I'm designing a river tank where one side will have a raised 'stream bed' so that I get faster water flow and the other side will be the full depth of the tank so that the current will be pretty minimal.
The problem is that I need a way raise up that 'stream bed'. I started by using a 4 inch thick section of the pink house insulation foam, but it's so bouyant that I needed to pile on 40 lbs of rock to keep it underwater. Not good since I'd like to avoid having to glue this in place.
So...I'm planning on using egg crate but I think I need something to pad the bottom of the egg crate so that I don't trap a small pebble and bust the bottom of the tank. My concern stems from my plan to have a fair bit of rocks on top of this raised section of the stream bed. I could make my own sheet of silcone to use as a padding layer from a large tube of aquarium sealant, but that sounds a bit tedious.
Any advice on materials for padding or whether I need it at all?
Thanks.
I'm in need of a little help here. I'm designing a river tank where one side will have a raised 'stream bed' so that I get faster water flow and the other side will be the full depth of the tank so that the current will be pretty minimal.
The problem is that I need a way raise up that 'stream bed'. I started by using a 4 inch thick section of the pink house insulation foam, but it's so bouyant that I needed to pile on 40 lbs of rock to keep it underwater. Not good since I'd like to avoid having to glue this in place.
So...I'm planning on using egg crate but I think I need something to pad the bottom of the egg crate so that I don't trap a small pebble and bust the bottom of the tank. My concern stems from my plan to have a fair bit of rocks on top of this raised section of the stream bed. I could make my own sheet of silcone to use as a padding layer from a large tube of aquarium sealant, but that sounds a bit tedious.
Any advice on materials for padding or whether I need it at all?
Thanks.