Bio-pellets I quit you!

[GMGQ]

A bacterial bloom is normal during the initial stages of running biopellets. You should have just been patient, sucked out the cyano and ride it through.

And yes, if the tumble was too fast, the bacterial mulm wont be able to hang onto the pellets.

Originally Posted by asylumdown

I started using biopellets after 1.5 years of running my tank and within a month my sand, rocks and glass were covered in cyano. Output was aimed directly at the skimmer, but maybe I had them tumbling too fast in the reactor. It's kind of hard to tell what 'too fast' is without physically watching the reactor of someone who is using them successfully.

I probably would have stuck it out and tried tweaking things if I hadn't needed to break down my tank, but it's food for thought for the next build.