Biggest problem I see with it is that it's too large for dwarfs unless you want about 100 of them.
For 8 dwarfs, a 2.5 would be sufficient.
I've kept up to around 50 in a 5g with no problem.
When you have too large of a tank, feeding becomes a big problem.
Dwarfs don't normally hunt for their food, but rather sit perched and wait for the food to come by so they can snick it up without effort.
This means having a heavy density of the enriched brine nauplii in the tank that also need to be removed before the next feeding as the enrichment is quickly lost and you want them to only feed on the new enriched ones.
In a ten, I would estimate feeding density would be about the same for 8 as it would have to be for 50 of them.