Plumbing my calfo

[bronck83]

I'd avoid the 90 degree elbows. I have a 75 gallon with a very similar calfo(ace built) with two 1.5" drains. I'm using clear flex spa tubing for the drains that way there are slight bends & no 90 degree spots. As far as the "durso" I'm not sure what that is, but ace recommended I do in the pic below to avoid the loud gurgling. It's basically a short peice of pipe going up from the T-fitting with a slip-on cap that is not glued but has a small hole drilled into the top of it to allow air to escape.