What do you recommend first?

[Vandyfan13]

Building a tank around 320 gallons. sorry American haha
Will have a 75 gallon K1 Fluidized Sump.
Anyway I am going the Motoro Ray route, but I'm also getting a ripshaw catfish which I've heard grow slower then stingrays. Which should I buy first to make it safest. At the smaller size I would assume the catfish would be what to get first since they are more peaceful. Thoughts? Opinions?

 

[NJBigBass]

They should get along, rays are peaceful for the most part unless they can eat it.

 

[SandNukka15]

Ripsaw catfish dont grow slow at all.... they grow like rtc....i had close to 2 inches a month in growth with mine.....they would also get too large for ur 320 and so would a regular motoro.

Skip the ripsaw and motoro and get a marble motoro