Ive just bought my ro di
unit, and am very happy with it
, i have a diy ato. No electricity! Just a simple drip line from a ro di
adjusted to the calculation of evap daily. I might be thinking about a skimmer, but i will not sump anything unless its drilled. ( simply wont trust an overflow) so id rather just keep my weekly water changes instead of buying a skimmer... Skimmer will crowd my tank, an take away some maitnence that i find useful in order to stay on top of things, like water quality.
If i were to upgrade, a 75 gallon would be my ideal choice, although, i would also do a 120. Then drilling and sumping and skimming will be my only options