hello im new to this and didnt really no to mutch apart from what i have been told by the pet store when i brought my new tank i was told to complete the cycle i had to add all of my danios into the tank after 48hrs << what i now no is wrong although i did do this and now feel really cruel as they all have bright red patches around there gills Erratic swimming and twitching and have gone pure white i just wish i found out about everything before this had to happen or evan if they told me allow the tank to mature before you stock it with fish!!