Fritz Turbo Start product

[Duganie]

Does anyone know if I can add Fritz Turbo Start into an aquarium with fish IN already? Just curious. Thank you!

 

[Delapool]

Most of these can be added with fish in (would have to read instructions specifically though). If it’s just nitrifying bacteria all fine, if it contains sludge destroying bacteria there is a small risk ime (wouldn’t add if you are treating fish).

 

[Barliman]

What Delingpool said. I haven't used the Fritz product, but, if it's like Dr. Tim's One and Only, you can add it after fish have been introduced.