I have a yellow ray and I love him. He's in a 180 right now awaiting my 300 in the basement as soon as I get it set up. I must say this he is so damn cool.
I tried going up towards 25/26 but my hippo tang kept getting ich, so I stay right around 23 for now.
I don't know if you have a Meijer around you but I buy the squid in green bags and my ray and bamboo love that stuff.