Yep, sounds about right.
What size tank and what are you using for a return pump? Another option is to use these: http://www.bulkreefsupply.com/return-jet.html They work great. I have two of these plumbed together on my 120 gal return.
A lot of people also use Loc-line: http://www.bulkreefsupply.com/plumbing/loc-line.html
What size tank and what are you using for a return pump? Another option is to use these: http://www.bulkreefsupply.com/return-jet.html They work great. I have two of these plumbed together on my 120 gal return.
A lot of people also use Loc-line: http://www.bulkreefsupply.com/plumbing/loc-line.html