John:
yes, those corals will eat this food - at least parts of it, depending on the feeding response and the particle size.
On Selco, no its not a typo. Selco is the concentrate. Selcon is the highly watered down aquarium version. Selco pours like a thick milkshake. Selcon, by comparison, appears to have about 1/4 teaspoon of Selco in it mixed with water to make up the small bottle.
On the old tanks, see Michael's response. Yes, that was my regimen back then - many years ago already. As for skimmers, I have no skimmers on my bedroom tank, my lab tanks (including the stony coral tanks) and had not had a skimmer on any tank for many many years. Following a huge wipeout back in 1999 while I was in Australia, I decided to add a skimmer to my main tank for the times when I was out of town (which, as you guys know, is a lot). Problem is, i always forgot to turn it on when I walked out the door, so it was still unskimmed.
Then, after one of my Indonesia trips in 2001, I turned it on, and didn't get around to turning it off again for several months because I was going to be changing the tank soon as I set up the systems at my lab...figured I'd just keep it going. I made the change and, of course, ran the skimmer during the changes and then, after rethinking things in terms of oxygen at night (basically that i wanted lower flow at night but without compromising O2 from biomass), I ran it at night for about a year.
Then, I've also become more concerned about plant and animal chemistry in small volumes, so I have really upped carbon use in the past three years and for the past year, I have begun skimming the one system all the time. I have compensated by adding even more food to the tank than I already was, and feel that the health of the tank is still equal to what it was without skimming. I have far less filter feeders on the rocks than when I didn't skim, but still have a lot and good sponge growth. All in all, I guess my prlonged absences away from the tank, both at lab and in travels, has swayed me to this regimen for my main system. The other tanks are too simple to worry about skimming at all - only thing that hurts them is when someone forgets to add water for many days at lab and the salinity spikes.
My wife is a great tank keeper in my absence and is very observant of things. I have no doubt that the skimmer is simply my paranoia based on past nightmares. But, for now that's how I am doing things. I'm sure it will change again as my lifestyle changes - one way or the other.
I don't use ESV anymore...I think 1997 was probably the last time I ordered ESV - liked the product fine, but I had trace element concerns and no longer saw the need to pay the money for basic chemicals that could be had for a fraaction of the price. In fact, that was about the time I almost entirely stopped supporting the dry goods section of any fish stores with the exception of a very few things.
WM tasker...you lost me...what are you asking? over the counter LPS recipe?