Hmmmm, I never put together any kind of journal building it.
I can tell you there is a water pump inn the bottom of the reservoir that circulates water to an aquarium chiller then back to the reservoir.
Other than that itās all air pumps and air stones and I also have an o2 grow in there for that extra oxygen bump.
This was all my base parts
And hereās my ābolt onā parts
EcoPlus Chiller, 1/10 HP
https://www.amazon.com/dp/B000W4S45C/ref=cm_sw_r_cp_apa_i_41Y5CbKBPWHDB
O2 Grow Dissolved Oxygen Emitter 2010 ā 10 Gallons
Lots of money for them but as long as you get a chiller made for salt water both of these parts last a long time. Iāve had both over two years and no sign of slowing down