@Gogi
Hey howdy

I do have an opinion and a little works/example thread on the matter
http://www.nano-reef.com/topic/369846-pongpits-2gal-pico-its-a-13-months-vase(update2016108)/ these threads show some real changes in the hobby. literally reefs in goldfish bowls and the like...
www.reef2reef.com
Irony=large tanks are hard to keep sps in, and fishbowls are not. Proofs are linked

any system where the keeper has immediate full access to the water column can keep sps by repeating roughly ten steps that work for all pico reefers. any system so large that being able to do a full water change all at once isn’t avail has challenges the small tanks don’t have
How this helps large tankers, few do fishbowls ha yep: it’s brainstorm material. Copy what you can from the known working method and upscale it in a questionable system
One thing we do different is the actual starting setup: most pico reefers use high quality live rock in the setup and this food web at the start makes a huge difference
We don’t have to carefully, hesitantly partially feed our systems for fear of nutrient overloading and filling a sandbed up with waste (starvation is big deal for large tankers)
No, a pico reefer can blast into a bowl 2 weeks worth of feed all at once, not starved+live rock, then just change out all the water later on and reset system cleanliness immediately while polyps are fed better than large tanks. That’s why pongpits bowl is so awesome it almost looks fake.
Also, we don’t care about nitrate and phosphate levels bc feed in, feed out, clean water is all it takes for pico reefers to keep sps
My bowl keeps sps for fourteen years and I do not know any of its params beyond temp and salinity. It’s cpr = feed in, feed out, water change over and over and over. No supplements required no ICP testing we don’t get RTN, STN, we simply have lack of room issues.
How many sps threads do you know right now where some form of invasion is over growing sps? How many are pico reefs with algae problems? That’s a large tankers headache. Pico reefers are willing and able to directly access their system to kill algae, we don’t wait for it to hopefully go away by starvation. Sps grow well for us because we create real estate that is open and ready and only coralline base, not bone white rock ready to grow more algae
Large tankers have to be hesitant, easy feeding, can’t easily access all areas of the tank for real estate guiding
we just kill the algae day one then it’s gone. Size of tank equals access ability, access ability alone determines sps health for pico reefers.