overstocking

Hi! My 30 gallon tank has finished cycling, and so far I have 9 zebra danios in it. I plan on having the following fish, and I am wondering if they will be fine. 1 angelfish 2 dwarf gouramis, maybe pearl 9 zebra danio 1 or 2 bristle nose pleco(s) 4 Otocinclus or panda corys I might swap the...

If you have an overstocked aquarium would adding extra filtration compensate for overstocking? As long as the fish don't seem stressed from overstocking? I have fancy goldfish, dojo loaches and cory cats in my tank. According to aqadvisor.com my 75g stocking level is at 135% and recommends 50%...