Hmm... I was just thinking over my plans for my DIY and came to a road block. Instead of opening a new thread, ill just post here (sorry to threadjack you lol).
The pump I will be using is a Quiet One model 1200 pump. I got a good deal on one ($10) so I will just be using that.
I plan to use the pump inline, meaning it will look like this: = means tubing  means pump
Fish Tank ========  ======= Canister
The problem I am seeing arising is the power of the pump. It is rated at 296 GPH. The tank it's going in is a 20 gallon long. I am thinking that this flow will be too powerful going back into the tank, and possibly disturbing substrate/plants.
I want to add one of those ball joint pressure regulators that you are using, but my question is:
Will it work better/safer if I put pressure regulator before the pump or after the pump?
If it's before the pump the setup will look like
Fish Tank ===== X ====  ===== Canister
= meaning tube X meaning the regulator and  meaning canister
Tell me what you think?