I think its a great idea. You'll have to have enough lighting and plant biomass (lots of emergent/floating plants) for 45 tanks.I originally posted this question in the DIY part of this forum. After reading a little more I thought it might be more appropriate to post it here.
I am changing my fancy guppy breeding fishroom and putting in a central filter for approx. 45 tanks. What do you think of putting in a refugium type filter? Similar to the refugiums used in reef tanks only freshwater of course. Is this possible?
Also and more importantly, if I were using a central filtration system, I would add a very serious UV sterilizing filter downstream of the refugium. Without a UV sterilizer, one sick fish could easily spread disease to every single one of those 45 tanks.