Quick question do you think I might be getting ammonia readings cause I don't clean to tube out good enough I usually since it out with water then dry it off with a tissue inside and out should I do it differently?
Sitting here and put down a few notes.
No more Cory cats!! It looked like you bought more fish several weeks back. No more fish buying for two months and the tank is too small anyways to be buying more fish.
Take a water sample into shop and get it tested for ph, nitrite and nitrate. As I don’t think you have a solution / vial test kit. Without proper tests we’re just guessing where cycle is at.
It looked to me as well that tank is now over-stocked and possibly zeolite no longer working - which was always going to be some pain as it takes up to 2 months to cycle a tank.
Either it will cycle or ammonia will be persistent until some fish are too stressed, die and tank bioload reduces so tank can establish. Watch the Cory cats as they seem a sensitive species imo.
Water changes and prime.
The prime may on occasion slow a cycle down but all tanks eventually cycle. (Just in case you see threads saying to stop using it).
The cleaning as actually too clean. Just rinse it in old tank change water as the bacteria live everywhere and you are cleaning them off.
When tank is cycled you can clean parts of filters as enough bacteria elsewhere to repopulate. Nitrifying bacteria growth is very slow so this is why it takes ages.
Any plants will use up ammonia, etc and worth a try. Eg stem or floating plants.