[Overstocked aquarium?]

It's about a month new had started with goldfish for 2 weeks then started adding fish its a 75 gallon I was thinking  may be filter I'm using tidal 75 should upgrade to tidal 110 because it can filter more than 75 plus fishes 

[Overstocked aquarium?]

16 hours ago, Patrick_G said:

Sounds perfect to me, why do you ask? Are you wondering how many more fish you can add? 😀 (Like most of us) Or are you having trouble keeping water clean? 

The nitrite level keep growing and I do water changes every 3rd day 

[Overstocked aquarium?]

I have 3 adult angelfish, 4 juvenile  angelfish, 5 green corydoras, 2 otocinclus, 2 rubber lip, 4 blue gourami. They all live in a 75 gallon  aquarium.