I am preparing a 38g puffer fish tank, on which I will be using an Eheim 2213 filter. This is not my first fish tank, but it is my first canister filter. I find the directions that came with it to be very vague, and I had a few questions.
#1) What are the two gray nozzle looking things at the bottom left of this picture? Which line do they go in, and why?
#2) Do I need to use the provided intake tube (the green U shaped one) and return tube (the green straight one)? They're kind of ugly, IMO
, as the tank is going to look like a saltwater setup, and green doesn't go too well.
I see on a lot of tank in stores that they use PVC
"U's"? What other options do I have?
#3) I am planning on using aragonite (basically very coarse sand) as substrate. Do I need a prefilter on the intake to avoid damage to the Eheim?
#4) I am going to be using an inline heater. If the nozzle things in question (1) go in the return line, should I place the heater before (closer to the filter) or after them (closer to the tank)?
Any input is appreciated,