Can help me with this ?

[AngGuKueh]

it was built up inside my biopellet reactor

[jxlex]

Maybe not enuf flow thru the reactor resulting in this... Manually remove?

[AngGuKueh]

will this harm anything ?

[jxlex]

If I remember correctly, not enuf flow and clumping of pellet may increase some chemical into the tank which is not good... Try googling see if u get any info

[jxlex]

Ur pellets should be tumbling rigorously http://youtu.be/pTS0YD2nylU

[Gouldian]

Those are accumulated bacteria biofilm. In normal situation these biofilm will be purge out from your reactor and be skim off but it seems that they are accumulating to a ball size inside your reactor.

As per jxlex, I feel that the flow in side your reactor may not be sufficient, hence you need to change pump or a better reactor.

In the mean time, you may want to disconnect, manual remove the reactor and rinse the pellets thoroughly.

[AngGuKueh]

thx for the info it time for me to change the pump

[jxlex]

Ya was reading online that too low flow my cause the release of hydrogen sulfide or something. http://reefkeeping.com/issues/2005-12/rhf/index.php

[AngGuKueh]

That was a great articles thx alot