I would like to build a Sump with 4 chambers. I bought a 65 gallon tank for $80 from a neighbor. It measures 36inL x 18inW x 24inH.
1st Chamber: 2 returns from DT
2nd Chamber: DSB, LR, and Caulerpa
3rd Chamber: Chaeto ball tumbling with the help of small powerhead.
Bubble Trap
4th Chamber...