You sure are hard headed. Numerous times you've been told your tank is well stocked as in no more fish or your system will crash. But if you insist, they are both the same though the paradise will be fin nipped for it's long flowing fins. This wouldn't be the case if you had a larger school of tigers in a bigger tank. IMO dwarf gourami will also be picked on because they are peaceful fish unlike their larger cousins.
:thm:Well bioload would be correct if the tank were larger. In this case it is the size of each fish. Remember each barb gets 3" long. You want 8 of them. It really wouldn't be a problem but you have a 20 gallon high. If it were a 20 gallon long then you could worry about bioload because now you have space. These fish use lateral space not vertical like angels and discus fish do. You also need to remember that barbs and gourami use the same swimming space which is middle. Why don't you just upgrade to a bigger tank? Even a 29 gallon would allow you to do most of the things you want to do.
You also need to remember that barbs and gourami use the same swimming space which is middle. Why don't you just upgrade to a bigger tank? Even a 29 gallon would allow you to do most of the things you want to do.