Opinions appreciated: check valve vs anti-siphon holes in overflow returns

[outacontrol]

Originally Posted by gregzz4

With the limited # of responses to using a check valve, and the thoughts on it fouling etc, that option is off the table.

Have you looked at the George Fisher check vavle http://www.bulkreefsupply.com/store/...wiss-made.html

They don't have traditional seals to dry out and foul up, and they come apart very easily to clean and maintain.
I have one and love it! I have been using it for about 7 months now.