To Over Stocked?

first tank definately shouldnt have silver dollars in small tank they need a large tank as they get big and are a shoaling fish.
second tank seems ok but watch barbs with gourami
 
In the 29g I have now It has:

4 Silver Dollars 4-5"
1 3 spotted Gold Gourami 5"
4 Sterbai Corys 2 1/2"
3 Mystery Snails

I have heard people that have 29g with just 6 Silver Dollars. I also read online 30 Gallons for Silver Dollars. They do not grow more then 6"
 
30g is the minimum for a pair of 6" fish, so 6 silver dollars definitely need a larger tank.
 
first tank definately shouldnt have silver dollars in small tank they need a large tank as they get big and are a shoaling fish.
second tank seems ok but watch barbs with gourami

Agree with that. Silver dollars need at least 4 foot IMO.
 
Silver dollars are active swimmers and get large, I would say they need at least a 55 gallon tank. Make sure you feed them plenty of green foods, as they're herbivorous.
 

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