Leopardshark......
I felt a little urgency, and wanted to catch you before you bought a new pump. I was re-reading, and I saw this quote.
BTW, the mag 18 is tricky to install, because it has a 3/4 output but you should use 1 1/2" hose with it, and then reduce it to 3/4" so it can fit the skimmer...
Did they, (at AquaC) recommend this? I'm just a little concerned on that concept working for this skimmer.
I believe that may actually be reducing the velocity of the water. I could be wrong, but I sence that the pump can move more water volume that way, but at reduced velocity. (velocity being the factor that makes the pressure rated pumps have the best performance on these skimmers) and also the reason for the bigger power bills.
Sorry, I don't intend to be a nag. It just occured to me that may be the actual problem. Also, I realized that the people who wanted the 1" injector were using pumps with 1" outlets, and felt they'd be restricting their pump reducing it to a 3/4" tube right away. That way they don't have to reduce it until it gets to their injector. In fact, that way, it doesn't get reduced until it gets to the crimp in the injector. (greg uses the 1" injector on a Mag24 which has a 1" outlet.)
So I now recomend to try this, (and I should have thought to tell you this in the first place) run the shortest 3/4" flexible tube strait from the mag18 pump (no gate) to the 3/4" injector. Then drop that water line like I described, give it a day to adjust to new plastics, and see where that foam head reaches. I have a good feeling about this Idea. (and I believe this is how others having success using the lowest recommended pump for their aquac skimmers are "gettin it done")
Sorry I didn't think of this sooner, and I hope I catch you in time.
Here is a pic of a good 3/4 hose connector thats less restricted than a grey pvc nipple. It's 3/4 flexible pvc in the pic hooked up to it (for utility use) But vinyl hose could be stretched on there too.
That's a 3/4 inch female thread (to pump) and a 1/2" threaded reducer that the hose is twisted onto.
Yikes, I need to mop my bathroom floor. :eek1: