dbw1968 > Look at the psi to cfm curve on that pump as its listed (SL-94) 4.2 open flow 2 cfm @ 4 psi > 1 cfm @ 5.5 psi and 0 @ 7 psi, it states its good to 15 ft but is exhausted at that depth, I dont see that pump a good value as far as $$ for cfm at the diffuser,if you placed your diffuser at 10 ft you would have about 1 cfm available.As Cary suggests look into a vane or a wobl for a better value.Linears are great for shallower water but are the quietest pumps on the market.
