gkarshens and Stoney Mahony - Thanks, guys :thumbsup:
I had a little cyano outbreak, not much but enough to bother me. So I did a Chemi-Clean treatment and pretty much wiped it out in one fell swoop. I've begun adding carbon at a much lower quantity (about 1 cup) and I change it weekly, instead of my previous regimen.
Okay, how about some good news for a change? As John alluded to, I've joined Club Deltec. I went ahead and got the Deltec MCE 300 HOB skimmer after seeing the nasty skimmate that Deltecs put out. I've been happy with my Remora, and I've never had any measurable nitrate or phosphate despite having 4 fish, lots of corals (prior to being ravaged by AEFW), and fairly hefty daily feeding. But when I saw the crap that Deltec skimmers were pulling out, I just had to have one. A few modifications were necessary for it to fit onto my sump. First off, this unit is a few centimeters wider than the Remora, and if it were 2 mm more in width, it wouldn't have fit within the constraints of my sump's skimmer compartment. The next problem was that the return tubing from the skimmer to the sump was too long, as it was running into the shelf inside my cabinet. Here's the skimmer, without the drain pipe connected.
In this close-up you can see what I mean about the pipe running into the cabinet shelf.
The next hurdle was that the drain pipe extended out into the refugium compartment. Both of these horizontal tubes had to be shortened, and this was safe to do according to Doug at Deltec. The return tube was easy to remove and cut, but the horizontal drain tube was mistakenly glued into place by the manufacturer, and I broke it trying to get it out (it's supposed to be a slip fitting). Fortunately John and Brian at Kingfish Aquarium gave me a new one from their shop, and Deltec will send them a new replacement. This new tube was cut to proper length, then installed.
When I installed the skimmer, I then realized that the strainer of the drain pipe was still above the water level. I fixed this by heating up a segment of 3/4" vinyl tubing which was slipped over the strainer and the riser tube. Sorry the orientation is reversed in this next photo, but you're a smart audience and you can compensate for my inadequacies as a presenter.
I didn't feel the need to clamp this connection, since I don't want to accidentally do it too tightly and risk cracking the material. Also, it's fairly low pressure and a tight fit at that, so it should be sound.
The skimmer began producing foam almost immediately (it had help, as I had recently treated some cyano with Chemi-Clean). After the first 48 hr of operation, here's the skimmate that was produced.
And here's the tissue I used to clean the riser tube inside the skimmer body itself.
So much for a 2-day "break-in" period, hu? I'm going to have to cut off the lowest 6" or so from my light rack in order to facilitate removing the collection cup. As it is currently, I have to loosen the skimmer's attachment clamp and slide the skimmer back to remove the cup, which isn't very convenient. But I am happy with this skimmer. It's extremely quiet, much quieter than the Remora. The skimmate appears richer, although I have to say that the Remora was much easier to clean than this one is. I'll reserve additional comparisons until I've had more time to work with this new one.