I used to be dead against biopellets because I saw so many people having troubles with them. There are a few things to keep in mind when using them, and other than that they do their job - really well. I don't need biopellets in my own tank, but I do use Prodibio (for good bacteria balance) and vinegar (to make the kalk more concentrated). Though the latter two the carbon dosing effect is the secondary effect for me.
