Bottom up: Thanks for the compliment on the gasters and yes Cujo is in the house, breeding like clockwork and attacking anything that moves ;>)
Some of the pictures in the gallery show a wall unit on a central system. Lighting of just about every flavor had been used at some time, but I eventually settled on metal halides across the board; 70-400wt depending on tank depth, specimens, etc.
Tried a large carbon reservoir on the main return line to remove potential compounds antagonizing the different species, did not seem to help long term.
Symptoms: lack of expansion, lack of growth, lack of appetite, increased wandering, tentacle absorption, and clown pairs relocating to "healthier" specimens. It was interesting to note the clowns would occasionally move back after the original anemone "recovered" and the new anemone went into decline. Maybe interesting is not the right term, because the constant shuffling of clown pairs between "choice anemones" made separating the pairs in the 300g impossible

Was unable to correlate events to lighting, general water conditions, hosting, etc.
In isolation, the anemones do not seem to be irritated by outside influences. They act in a "predictable" manner in line with water quality, lighting type/age, hosting, feeding etc.
fwiw: back in the days of my Carib biotope, I preferred to have helianthus host anemone shrimp over clowns.
fwiw2: S. tapetum seemed oblivious to having any other corals or anemones in the tank with them. Can't tell the difference in isolation either.
btw: Just make sure you wash that shirt this year ;>)