Sounds like you've got a lot of activities that will keep you busy, and possibly not allow the dedication and time that this hobby requires. As much as I hate to see anyone not go all out, I know there is more to life than saltwater... like swimming and diving in it. I understand...
I certainly do not want out of the hobby, but this is getting a bit ridiculous...ich, green hair algae, dinos, aiptasia, dying fish, little to no coral growth/ coral loss, etc.. In the (less than a) year that this tank has been running, all the time I've put towards it has been solely to get back to zero. I've never had to put this kind of time and effort towards this hobby before. I know that this is how it goes and I don't want to sound like I'm whining, but at some point something's got to give. Either I'm going to start seeing positive results from the work I've put in or I'm just going to downsize to the 29BC and start over. I will not start over with this 200g and risk having to do all of this all over on this scale. I have other stuff I want to be doing with my time.
I'm not throwing-in the towel yet though. I'm still giving it a fair shot until I get a realistic offer on the DT system. If, by that time, I can find some enjoyment out of this, then I'll keep the big guy. I love this tank but half an hour every day fighting a losing battle is wearing me a bit thin. I did a 30 gallon w/c on the DT this morning with Reef Crystals and am mixing another 30g of hypo because the QT needs a big w/c badly. When I did the w/c this morning on the DT I tossed a MJ1200 in the fuge, mixed it up real good and connected a hose from the MJ to run through a 100 micron filter sock to help clear all the gunk that had settled in there. I cleaned the skimmer and siphoned out the little amount of dinos I could find. Once I do a water change on the QT tomorrow I will mix another one for the DT. I'm thinking maybe some of the poor-looking corals could be secondary to no w/c's on the DT b/c of the dinos. A w/c without feeding dinos would be a huge motivational boost to keep the DT.
What a bummer to hear about the troubles you have been having! Have you thought about the natureef system or something similar? I know some people are having great results with it.
I haven't really considered it. I have an idea of what I'll do with the 29BC if I downsize. I will keep it simple with top-of-the-line equipment.