T Tstone Feeder Fish MFK Member Jan 2, 2012 265 0 0 United States Jan 26, 2012 #31 toweraquaticservices said: I know people have had success with applying Drylok to plywood directly, but I highly suggest lining the plywood with 1/4 hardiboard. I used 1/2 ply lined with 1/4 hardi for my 112 gallon, i'm sure it would work for a sump Click to expand... What is hardiboard? Lol sorry.. And you think 1/4" plywood would work for say a 20gal sump?
toweraquaticservices said: I know people have had success with applying Drylok to plywood directly, but I highly suggest lining the plywood with 1/4 hardiboard. I used 1/2 ply lined with 1/4 hardi for my 112 gallon, i'm sure it would work for a sump Click to expand... What is hardiboard? Lol sorry.. And you think 1/4" plywood would work for say a 20gal sump?
