It probably possible under certain conditions but it's best never to mix fish that most likely won't work out.... Iv done some experimenting in the past and I regret it now as it's the animals that end up suffering for our curiosity.
That's a tuff one. You have 5 schooling species in very low numbers... Minimum is considered 6 but for 55gal you should be aiming for much more. If was me I would focus on rainbow fish and do a larger school and re-home the rest. I wouldn't add angel fish with 3 dwarf gourami's.
I would focus...
If you want an active tank I would do the following.
40 rummynose tetra's
20 Cory catfish
6 honey gourami's (1 male 5 females)
12 Amano shrimp
1 red tailed shark.
1 whiptail catfish
This covers all areas of tank and feeding types for a pretty balanced tank. Would suit lots of bogwood and plants.
Wow plenty of options with 125gal.
Single Red tailed shark is perfect. Any aggression will be limited to his territory which would probably take up around 25gal of space.. just provide a cave.
Plenty of cichlid options. Group of blue Acara for example. Dwarf cichlids would be no problem...
Iv kept a few different red tailed sharks over the years and they all had different temperaments... I consider 55gal min for community tank and 75gal safer.... They sometimes single out a fish they don't like lol... I never had major problems with them. Just make sure you provide a large cave...
Found paper on using kombucha tea to enhance feed for African catfish.
They found it increases growth rate, immunity etc... They spray the 'tea' on the fish feed rather then use the bacteria disc as feed. The fish are still ingesting the bacteria either way so I'll give it a go in my tank and...
If your climate matches fishes temp range then sure you don't need a heather..... Or if you wanna crank up the heating 24/7 during winter lol.....
Fish can handle wide temperature ranges for periods... We got seasons after all. For home aquariums it's best to keep it at optimum temperature...
Standard pest snails and they are generally introduced with plants.
For me I love snails... they are only a pest if you overfeed or there are too much nutrients in substrate.
Use them as an indicator of how well your tank is doing.
Yeoy I'm finding all sorts of stuff living above waterline...... woodlice, snails, spiders!
When I remove water lettuce and give it a good shake in water my fish have a field day eating all the little critters living in roots..
Major success with this tank. I have now two lights, one running 6 hours and one running 12 hours and natural sunlight.
I have 6 rainbow stiphodon which are super algae eaters along with Otto's and a twig catfish. I have bamboo shrimp which filter feed from water and loads of cherry...
Information and topics are endless trust me. People spend half their lives studying topics like animal behaviour for example. I spent a year on a single topic relating to fish and only scratched the surface.
Behaviour, chemistry, biology, physics, Construction/DIY, ART. Fish keeping literally...