Hmm,
then do a water change bro. See if that helps to tune the oxidising potential of your tank up (:
Ohh,
haha, that's good luh. I love both and will wish to keep both but under metal halides lightings, it's hard especially for yumas to pinpoint a good location to grow them. Rics on the contrary, is put there and let it go pui pui. Strong lighting helps for rics, but for yumas, should be on the contrary (:
Happy Reefing,
Marc J.