@Robert K I've personally attempted to keep one lone male cichlid with a group of Senegal on 3 separate times.
After cichlids matured they eventually became territorial and started to push bichirs around.
I agree with what you stated about the tetras and the senegal growing up together. I personally wouldn't try a community like what you have with larger bichir species.
@yve are the worms flat and glide on the glass and substrate. If so those are planaria. I suggest treating the aquarium if they are planaria but if they are detritus worms like stated I wouldn't worry about them.
@Sparkyrad5150 I personally would use the pre-filter pad and any of the biomedia. I don't use carbon or anything to help remove Ammonia, Nitrite, or Nitrate so the last eight wouldn't be a choice for me.
@Rockhound welcome to the forum. I suggest testing your water to find out if it suits the species you have listed. Some from the wild come from water with lower PH hardness. Test GH, KH, and PH and list them here.
@Comradovich that is excellent advice.
I personally had planaria and leeches in my copepod colony.
I personally collected from a nearby lake and never thought it contained so many unwanted critters 😆
There is no more planaria or any signs of leeches after 2 months of observation.
@JoeQ I personally would just smash a pellet until it looked like powder. Never used live Daphnia or Bloodworm Powder.
What type of food do you feed the adult Guppy?