A 2" airlift sucks most of the heavy wastes over the corner overflow wier, into the sump.
My first stage is, a wedge wire sieve, " still under construction " $400.00 price tag....
So some times I will use an improvised 200 micron mesh, in the picture. When cleaning or flushing the coral heads...
Typically I use a wedge of 1/8 hole very porous gutter foam, $5.00 48"×6" from Lowes.
This gets cleaned about once a week.
From there the water goes strait into a 24" x 16" upflow algea scrubber, with 60 watts to 100 watts of submerged lights.
My pump is mounted in my basement, yes I have 250 gallons of water on a second floor, lots of steel support.
In the basement I use 55 gallon drums, which cycles water on a closed loop at low flow, which I can isolate, dump and refill for water changes.
Then a final filter sock 7" x 16" with a 1" thick poly floss liner with a pvc coupler hot glued for a good seal. Which is inside a 200 micron nylon mesh 7x 16 sock. I can usually go 2 weeks on one filter sock. I have space for two, but one is sufficient.
I custom built my 90 gallon sump. The other half has grow out tanks, aka Jail, and a biochar media .
I have no substrate, just tiles that look like sand, and have 300 watts of liquid cooled LED. that grow alot of algea, the fish feed on.
It is also a coed tank, were the pecking order is sorted out among the fry that avoid the synod cats, and the current tank boss.
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