would I go through nitrogen cycle if adding bio bacteria, established spong filter to my new fresh water tank?

Question

I have 120 liter aquarioum I added 2 goldfish, 2 new sponge filter, 6month istableshed sponge filter, bio bacteria,general aid medicen just incase the gold fish has desise ,this is my 5th day amonia= 0 nitrite=0nitrate=40 ph=7.4 when the nitrogine cycle will start or ist alreday established I need to know if I can add 2 adult discus fish to my tank should I do it or should I wait

Answer 1

Since you have zero ammonia and nitrite and 40 nitrate you are now cycled. I would wait at least a few days but you should always quarantine a fish before you add it to a tank.

Answer 2

in case you extra micro organism and have an prevalent clear out... (which will even have micro organism...) then they already processed all the ammonia— you're nitrogen cycle is in finished swing! Ammonia is step one interior the cycle, and maximum deadly to the fish. You upload the nitrifying micro organism (perfect achieved) which will then produce nitrites and finally nitrates, that are the least risky. at last those nitrates will improve and strengthen into poisonous to the fish that's why water adjustments are mandatory. because your ammonia is low/non-existent with fish already residing in there for some days, seems such as you're perfect heading in the right direction for a healthful tank.

Answer 3

gold fish are real Hardy they can put up with a lot it sounds fine but you are still not sure buy some guppy's and see if they live if so buy what ever you want and you'll be fine