I understand the science behind bio-pellets and have said so. From reading threads where reefers ahev tried them, they are having much difficulty getting them to tumble correctly, cloudong their tanks and all sorts of other problems. Reading articles on carbon dosing and pellets, there is absolutley no way of knowing the amount of carbon and bio films being released into the aquarium. What I have said, is court is still out on them and that the equipment necessary in running them can get expensive. The science behind all carbon dosing is still very incomplete. What I have said is until they are proven to be more effective then other carbon dosing are they worth the expense. again, it's JUST an opinion. Not an argument. I do not wish to bash what others try. We all try different things. I would never tell any member on this forum OR any other to take their opiniond elsewhere. In fact, I belong to numerous forums and do not find this clickish attitude to be as strong as here on MR.