For one, thanks for the backup guys. we need to help the new members, not criticize them. Secondly I agree your tank is way to small for the amount of fish and you should be upgrading to a minimum 150g or get rid of the large stock that aren't your favorites. That's a polypterus(birchir) and not a rope fish btw.
And I also agree you should get rid of the pleco as they create more refuse than they remove, also noting that it's a common pleco which get very large, way to large for a 75 with that kind of stockage.
Goodluck
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