You think a retro would've okay. 6 inch sen aren't available? Or should I wait?The moke is stalking the del cause on the blood smell from its tail, i would remove the moke or put a divider, then i would add maybe 2 more sen like what the others are suggesting.
If that was me i would take out the decors or rearranged them, then isolate the moke and let the del and the new sen claime most of the tank as territory then introduce the moke after a month or so.
What are the size difference anyway?
How often you feed?
I dont see the moke can eat the del but worst case senerio is when the moke grab holds of the del and do a deathroll.
So far only thing moke and del are eating is tilapia. I feed every other day. But I alternate between tilapia and pellets. They've also been eating the green tiger barbs.maybe should switch to feeding them every day? Gonna get some more food for them this weekend.

