Keeping cories with bichirs could end up badly.If the bichir decides to snack on one,it'll choke on it.Seen it happen to many snakeheads and a few other fish.
Edit : Sorry ,skipped a few posts.
'"Most fishing sinkers are made of solid lead. Lead in fishing sinkers can cause lead poisoning. Lead dust from fishing sinkers can contaminate tackle boxes, tables, and other surfaces. ... Lead-free split shot sinkers, made of tin, are available"'.Hope this helps.
-2 tetras. This time, I think it was the Corys. Anytime a tetra gets close to there spot under the plastic driftwood, they come out and bang them. The 2 smallest ones are gone. They are like mini piranhas. Anything that will stop them from killing, please tell me
Maybe larger congo River basin tetras Will put them in their place. I don’t want giant danios because they are from Sri Lanka, and I want fish from the Congo River basin.