You have like a mini-blog going here, which is great, as we can all share your journey into this wonderful addictive world.
A tip for you, I used to use the bottled bacteria, yet on a large tank during the initial stages I was using a LOT of it at great cost. Then my LFS advised me of Aqua Pure Pond Balls, which I now use. You can get aquarium ones which are clear, the pond ones are black, yet the pond ones give you a lot more for your money - check the tub details! I put a handful of these in with the filter media when I do a water change, or if they are still there (they get smaller over time), I just add a few less. They are very economical compared to the bottled stuff, so you may want to look into them.
This Old Spouse is correct in that Bettas do not like a strong current, they are not very strong swimmers so prefer calmer water. That said, they will find somewhere to rest, on a leaf or tank decor if needs be. They just cannot cope with a strong current very well as it exhausts them quickly, and you may find they will have trouble feeding if the food moves around against the current. They tend to hang mainly in the top part of the aquarium, so if there is a heavily planted area away from the current you may find a Betta would be OK. Personally, I love them, and the girls are as entertaining as the boys, plus you can have more of them
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Other fish to consider, Kuhli and/or Java Loaches, Ottos (need a mature aquarium), Gobys...as you say the list is endless.
A tip for you, I used to use the bottled bacteria, yet on a large tank during the initial stages I was using a LOT of it at great cost. Then my LFS advised me of Aqua Pure Pond Balls, which I now use. You can get aquarium ones which are clear, the pond ones are black, yet the pond ones give you a lot more for your money - check the tub details! I put a handful of these in with the filter media when I do a water change, or if they are still there (they get smaller over time), I just add a few less. They are very economical compared to the bottled stuff, so you may want to look into them.
This Old Spouse is correct in that Bettas do not like a strong current, they are not very strong swimmers so prefer calmer water. That said, they will find somewhere to rest, on a leaf or tank decor if needs be. They just cannot cope with a strong current very well as it exhausts them quickly, and you may find they will have trouble feeding if the food moves around against the current. They tend to hang mainly in the top part of the aquarium, so if there is a heavily planted area away from the current you may find a Betta would be OK. Personally, I love them, and the girls are as entertaining as the boys, plus you can have more of them
Other fish to consider, Kuhli and/or Java Loaches, Ottos (need a mature aquarium), Gobys...as you say the list is endless.