maxxII
Super Housemonkey!
I would like to keep it that way which unfortunately means no Magnifica or Bubble anemones for them.
I've been keeping a pair of Rod's Onyx percs since 04 and had them in an H.magnifica anemone non stop (3 mags they've been in all of them over the years), with no loss of color that can be attributed to the anemone.
They turned brown for several months back in 06 and once I began feeding whole uncooked shrimp, scallop, mysis etc and got away from pelleted/dry food they havent lost color since.
I'm more inclined (due to my experiances), to lean towards food being the cause of loss of color vs anemone host.