Short answer: a crap-ton
More seriously though, you could fit 100+ and I honestly don't think it would look to crowded but rather stunning. Especially since it seems these will be your only fish, a hearty large school would look fantastic.
Also this is assuming proper aquarium husbandry: water changes, good filtration, good plant growth, and of course... water changes
ugh... water changes... hahaha! I don't plan on doing them weekly or anything but WCs will happen every few weeks. As part of the changes I recently made to this tank, I upgraded from an Eheim 2215 & Fluval U4 to an Eheim 2217!
Yeah I agree with the others you could go for quite a lot, a school of like 50-100 would look really good.
Although I do recommend you maybe add them in batches of 20-ish so your filter can gradually get ready to take that bio-load.
50-100 would be awesome!
plus minus 50 in this pic, and they just take up a small spot.
This is one of the pics I found while trying to find large schools of them! I love their coloring!
I suggest a minimum of 25, but build it up slowly and keep an eye on your nitrates.
If you do this, PLEASE post lots of pics and videos! I really wanted to have a giant school of nano fish (in my case chili rasboras) in my 55g, and I really regret not trying it. I would love to see how it turns out for you.
I just kept debating what to stock this tank with and I'm not really a fan of community tanks. The idea of a giant school of nanos seemed like a cool idea! Sadly, I suck at videos, at least well composed/edited ones.
Aqadvisor says 25 would be approximately 34% stocked with adequate filtration and 108 would be 100% stocking. Not that aqadvisor is exact, but it should give you an idea. I've had tanks stocked at 150% with a dense plant load and seen minimal increases in nitrates between water changes.
Thanks! I didn't even think about Aqadvisor! Haven't been focused on the hobby in a few years.
I will definitely be building up the total number of Embers slowly. Probably ~10 at a time to let the filter adjust to the bioload, that should ease the blow on my wallet too. I've been told, and found in my research, that I should mostly be okay with Embers and shrimp together. The tank has a lot of areas of dense vegetation & as the current planting matures will be heavily planted! I believe this will help with the bioload as well as any potential predation of baby shrimp by adult Embers.