So I have be running bio pellets now for about 5 months on my 90 gallon with about 60 gallons in the sump and I just added another 150ml of new smaller pellets. Now the new ones don't mix with the older bigger pellets very well. So I have to add a bit more flow. Question is with these eventually mix or will it always stay with the smaller ones on the top? Also with the increased flow the pellets are a quite a bit closer to the top of the reactor (phosban 150). I'm afraid that if the is a power interruption and when the pump turns back on the surge of water will push the pellets out past the screen and out to the sump! How bad would it be if say a small amount would escape into the live rock in the first chamber of my sump? Should I be concerned?