CPDs cannibalizing???

[seangee]

Shrimps are fine at 22. They breed slower, grow slower and live longer.

 

[lilsd]

You have an interesting possibility there. Bororas brigittae, the chili rasbora, has a 20-28 temperature range. What would you get if you went with no heater? What are room temps like in your house?

I had a group of the related Bororas maculatus that actually bred quite a bit in a softwater tank at a room temperature of 21-22. So the CPDs are known to like the cooler side of their range, and the Bororas don't mind. I've never kept shrimp to know though.

There's no guarantee it would solve the fighting. But going for the lower safe range with a number of small fish has dialed down aggression here. The fish often live longer too.

Wow that is interesting, I might just give it a try. Maybe it would help improve the algae/biofilm issue too….. I live in a small apartment and the room they’re in is the room that has the a/c. It does stay on the cooler side, closer to 68 but it probably rarely if ever gets colder than 68F. Although the room temperature does fluctuate more than I imagine the tank does with the heater on. Especially on hot summer days, or in the winter when the furnace is going…. It doesn’t bother me living there but I don’t know if it would bother them.