Quote Originally Posted by Toby Bell View Post
where could i get the eggcrate and how do you keep the substrate from falling in between the holes and from going into the water? thanks
Eggcrate is in the lighting section of hardware stores like Home depot Plaskolite | Egg Crate White Louver - 23.75 Inch x 47.75 Inch | Home Depot Canada

Fibreglass window screening can be layed down on top of the eggcrate to hold the substrate up and still let water through. You can also use landscaping fabric (I prefer this, I find it nicer to work with especially for curvy shapes).