I keep thinking about trying biopellets but I can't really beat the simplicity of adding vinegar using a doser. All I have to do is refill a container once a month. Very simple and straightforward - don't have to worry about pellet tumbling and I don't have to take apart the reactor to refill.

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. :lol:

I'm lazy,... would rather do it once a year (went a year and half last time) than once a day. Keeps nitrates near zero, and only test about once a month.

I use a doser for Ca and alk, but have to test often and make occasional adjustments. Once the pellets are tumbling properly (no more than a day or two of flow adjustments), no other adjustments or maintenance necessary.

I tried the carbon dosing initially, and for me it was a big PITA with all the measuring, calculating, and adjusting to get your nitrates where you want them to be.

Plus with dosers there is always a risk if something goes wrong, whether it is lines plugging, calculation errors (esp initially), or Apex (or other timer) going nuts on you.