i put a hoplarchus psittacus in with my red heads and i really enjoy his presence in the tank.
You could be right but I do look for spawning behavior or full mouths whenever I pass the tank. I did see a pair cleaning a rock and doing the mating dance the first night I brought them home. I wasn't able to stick around for the whole thing, so I don't know what happened, but obviously no eggs or fry. That was back in June and hasn't happened since.Your red heads may already be breeding, but with other fish in the tank like barbs and angels, the fry may be disappearing before you get a chance to see them. If you don't really care about keeping fry, then no big deal.
When my Geo altinfrons spawned, and they were very secretive, they would regularly pass eggs and fry back and forth for one to mouth brood, allowing each to feed separately. But other fish in the tank would pick off young during the exchange, until none were left. Not until I separated the mated pair to its own tank, was I able o keep fry.
Waiting until a pair forms, then giving them their own tank has worked well for me with many Geophagines. And then removing the male back to the community when fry are free swimming, because he can get pushy after a while.
How many Geos and Rokteils did you have?I've had spawning rotkeils and spawning red head geos in the same tank without much issue-- 135 gal. They took their turns spawning in their respective spots, the 6 ft tank apparently gave them enough real estate to work it out.
...my experience...
Also, not uncommon for them to need time to get some experience before you see fry. So, as mentioned, that could be what's going on. Tank décor can also be a factor at times, whether or not it creates spots where your respective fish can feel comfortable and defend eggs and fry.
niiiceJust got lucky . . . I'm picking up a proven breeding pair of Rokteils tonight from someone local for only $50 (total). They are 1.5 years old and around 6". Whew whoooo