I'm working on the sump plan for the 240g and looking at Kaldnes.
With a 75 gallon sump and assuming I need between 40 liters (10g) and 50 liters (13g) of K media, is there any disadvantage to going with the K3 on a larger sump set-up?
K1 - K3 side by side
https://encrypted-tbn3.gstatic.com/i...tWiuSwbt1tdG8P
I can'f find any images of K-2 but I think it is like the K-3 minus the outer ring. K-1 = 1 ring; K-2 = 2 rings; and K-3 = 3 rings.