Hi,
This is just a genaral question. I am going to set up a closed loop system on my 75 gal FOWLR tank becuase I dont want to have to put power heads in it. I was wondering what is the correct way to calacluate head pressure i.e. taking into account the T's and elbows and such. And I read somewhere that it is better to use 1/2 inch PVC or the 3/4 for a closed loop like this, is this correct.
Thanks, Hayes