Hey guys this is my first post and im new to aquarium keeping. Ive bought a 23L fluval edge tank and have cycled the tank for 4 weeks and added fish as I was told to. Ive got 2 guppies and 2 platys in my tank now. The fish have been in for 5 weeks now but my ammonia isnt droping and have not see any nitrite or nitrate. Should I be concerned or is this normal for a new tank to take this long to cycle?