RBTA losing color

[Fishtails]

I've had this RBTA since March of this year. It was very intense red, expanded to nearly 6-7" when fully open. I'm running a 150W 20K over a 24G. Initially the RBTA was at the very top of the tank and didn't mind the spot it was in. A few months later I notice the coloration began to fade and the tentacles now seem to be more 'stringy' than 'bubbled'. Color loss is noticeable. Any thoughts or input on how I can possibly help bring coloration/size back to before?

Before picture. Taken around 4-5 months ago.

And how the RBTA currently looks. A very noticeable difference in size and color.

 

[dc]

How much do you feed it? It looks like it's bleaching, and people recommend more food for it.

 

[Fishtails]

Don't directly feed. If anything it will catch the food that flows by the with the current. Foods vary from Omega-1 pellet, mysis, brine, cyclopeeze, squid, plankton, etc. Would you recommend to spot feed? If so what's going to be the best to offer to this guy?

 

[bradleym]

You could just put in some of the squid and mysis whenever those food choices come around. Once a week should be enough for the RBTA. More often is ok, just don't feed it daily, that will be overkill.

 

[Toddrtrex]

What are your water parameters -- with numbers.