Given that this product was originally used for directing coolant at tools, I would think it is okay out of the water!
Now, we all know that salt will creep if it gets the chance, so, watch for that.
Or, look at using
http://www.bulkreefsupply.com/store/...ular-hose.html This will let you go from hose, to Loc-Line. Just need to put a clamp on it. Then away you go.