New project, need input

[teresaq]

I am going to redo my 37 gal tank. It is 18x20x25 tall.
I want to try using the foam i have been reading about.
I am not the best a drawning so I will try and explain what I want, and need input on if it will work.
I want to start with an egg creat bottom in a half circle only about 9 or 10 inches at its widest.
in the middle back i want a piece of pvc pipe about 20 inch tall. I want to drill holes all throw it, and attach a power head or pump to the top, (blowing down the pipe) so the flow comes out the wholes. then cover the pipe with live rock and foam, leaving the holes open to provide flow all thru the tank. I have a picture in my mind, but putting it on paper and knowing if my Idea will work is another thing.
Any Ideas

 

[camanuch]

depending on the flow rate you are looking for i would recomend that you use a higher powerhead. there will be a lot of drag due to the pvc. how big of wholes were you thinking. i was thinking of the same for my 50 corner. except i was going to do it with flox pipe. so i can put it through my LR. keep good flow all the way trough my aquascape. still in he process of building the stand and i havent ordered the acrylic yet. IMHO lets say you want a flow rate of 300gph through your rock work i would say use at least a 450 powerhead or the next size up from the flow rate you desire.

 

[robn70]

You may also want to look into building a closed loop with an external pump. This way you'll have more water movement and less pumps to generate heat in the tank. I've been looking into doing the same thing for my 90 gal when i get the wall framed so i can get it set up.