Companions for tinfoils

In a previous post I mentioned moving all my small fish to another
tank as the tinfoil's had destroyed all the plants (even the Java
fern) and a few fish as well. (my fault - uninformed buy - didn't ask
enough questions - anyway too late now)
The new setup is working fine.
As to the old tank (1.2m - 450l) what can I put in with the 4
tinfoil's. There are some plastic plants (they don't seem to like them
G) and rocks. Algae growth is pretty prolific.
Thoughts a
1 x Red tailed shark (1 only as aggressive with own)
Algae eater - shops here can't say whether they are Siamese or
Chinese.
Anything else?


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Skil-Phil