Guys, Need your suggestion.
which check valve is best to purchase?
what about this: http://www.amazon.com/UNION-SWING-CH...s_1265146011_3
any thought about : http://www.bulkreefsupply.com/store/...&y=0&limit=all
and this : http://premiumaquatics.com/store/mer...Category_Code=
which check valve is best to purchase?
what about this: http://www.amazon.com/UNION-SWING-CH...s_1265146011_3
any thought about : http://www.bulkreefsupply.com/store/...&y=0&limit=all
and this : http://premiumaquatics.com/store/mer...Category_Code=