09/03/2026
I have been tweaking the sump layout and configuration and fine tuning it as best I can.
Its current configuration is, the dual overflow used to enter 2x 400 micron socks (which I’ve changed now to be a stack of foam pads from 20-50ppi), the it enters 2x 200 micron socks (or 100 when I want extra polish)
Then it flows into the next chamber which I have divided so I can use the first half as a refugium (which as floating water sprite and hornwort), this is then baffled with polyfill and then there is two chambers full of ceramic brick bio media, orientated in a cross cross pattern so there is higher flow through the parallel orientated media to promote more aerobic bacteria colonies, and the perpendicular orientated ones have a lower flow through them to promote anaerobic bacteria.
Then if flows into the chemical media chamber which has some Seachem Matrix Carbon and Purigen (I also keep some sponge filters in there to keep seeded with bacteria if I need to spin up an emergency quarantine tank in a hurry, so it will be immediately cycled). Then flows into the return chamber which houses a Mantis Tornado 10000 return pump (set to approx 8000l/h) which gives me approx 8 times turn over of the water volume. This chamber has an AutoAqua Smart Duo ATO to keep the sump topped up when water is lost through evaporation (using the 15G ATO reservoir in the sump)
All-in-all it is very low maintenance, every week the filter socks get changed (and pads rinsed). With the refugium configuration - the plants are nitrate vacuums. Without them, and with the overstocked tank - nitrates can get to 80-100ppm in 5 days, but the refugium is consuming nitrates very well, and keeps the tank to about 15-20ppm after a week
It allows me to go from 1-2 big water changes a week, to one 75% change every 2-3 weeks