I picked up this used 24x20x18 tank with 1/2" acrylic, corner overflow, and 3 sides and bottom made with black acrylic.
I drilled the back for a standard return.
I am going to plumb it into my 120 for about 30g's extra volume.
This should give my system around 150g's total.
I plan on running 3" sand bed and having it be a refugium with all the stuff I cant keep in my 120.
The goal is to do away with po4 reducing media.
Current no3 level is 4-5, and po4 <.1.
Without phosgaurd po4 will rise to .3ish. No issues running that level but my system just looks better, more color and polyp extension below .1 po4.
Eventually I will run it opposite the 120's light schedule.
I will most likely run my 150 halide since I have it sitting in the closet.
After a 3" sand bed thier will be 13" of water to the surface.
Should be online in a week or two.