How about flow? Of course you dont want to blast your SPS but for me the better the flow the better the color. I personally do not use any additives or feed them. Good flow, good lighting and stable conditions work wonders for me. I use 400W Radium but I have seen beautiful SPS tanks using T5 lighting. Water chemistry is by far the single most important factor and with that comes stability.
Flow is not an issue in the tank currently. It's a small tank and I'm running an MP10 on reefcrest mode at 80% on one end and a tunze on the other end. Flow is good, strong, and random and ultimately, the tunze is getting replaced by another MP10. Flow is not directed at any corals so they're not really getting blasted by it.
This is an awesome thread. Although it's title is a little misleading. haha
I have an aquaticlife 6 bulb fixture and have been running Ecobak since the tank started. I have a 100 gal. system with 11 fish, and feed 4 times a day. My phosphates were very low for the first 16 months, but now my bio load is decent, and my tank is packed with too many corals. So, now my phos sits around 0.06-0.10 depending on the frequency of my water changes. I have great growth and great color. Zero algae issues and no cyano. The cyano only came when my bio load decreased. I had an ich outbreak and lost a few fish. That being said, i was surprised that it showed up with less bio load. But Jon Warner of Warner Marine explained to me very well. Cyano being a bacteria, usually shows up when there is a bacterial imbalance in the system. whether you add more or remove the bio load to quickly. So dosing some nitrifying bacteria will help balance things out again. I'm not sure if you have switched to Ecobak yet, but I would venture to say that your existing pellets can and might be an issue with the presence of the cyano.
As far as color. I do dose iodine weekly, and I dose potassium as well. Potassium will bring the purple and blues out, but be careful with it, you can overdose it. I just started trying aminos as well. But on a very minimal level. I am only dosing those once a week as opposed to the suggested daily dosing per the Red Sea product.
Yeah.....the title is misleading but the thread has produced some really good points, good conversation, and good ideas. I've really enjoyed it. To directly address some of your statements, for which I'm thankful, I have slowly started to replace the pellets with Ecobak. I didn't want to take established pellets off line completely and replace with new ones, so I removed 50% of the NPX pellets and replaced that volume with Ecobak. My plan was to wait a few weeks for the new pellets to "colonize" and replace the balance of the NPX pellets with Ecobak to maintain some level of effectiveness. Not sure if this is right or wrong, but logically seemed to make sense to me. Maybe I'll jump right in and replace them all when I do my WC this weekend.
Regarding bioload, I only have 6 small fish in this tank, 2 of which will soon be replaced. I have 2 true percula clowns, a radiant wrasse (awesome fish btw), a blue/green chromis (on the list to be replaced), a Hawaiian Spotted Hawk (cool fish but on the list to be replaced - he's a bit aggressive for the tank), and a red scooter blenny. My intent is to get another wrasse of some sort once the hawk and chromis are gone. Just not sure yet. The one thing I am sure of is that the hawk is simply too aggressive for the radiant wrasse and I prefer that fish over the hawk. I feed the fish twice daily.
I have also followed the Jon Warner threads and comments here and R2R and have learned a lot. His knowledge is very helpful and I enjoy reading his posts.
I have never really considered dosing potassium. I do dose aminos weekly and am using the brightwells product. Daily dosing seemed excessive to me however I may increase the dose to twice weekly. I also dose bacteria.
Guys, don't chase numbers with iodine, those test kits aren't very reliable. You have iodine in your tanks, trust me... If you feed a fair amount, especially certain flake and pellet foods, or shellfish you're adding plenty of iodine every day. That's more than sufficient as we're still not really sure what iodine does. We do know it's not needed as a supplement as many many aquariums are successful without.
The only number I want to chase at this time is PO4. I too question the accuracy of the Hanna Checker, but it's the best that I've been able to get my hands on.