Help!!!

[chris88]

Help me please! I have had 1000's of small white sponges growing in my sump and probably all through my overflow and return lines. The problem is that over the past few days the sponges have literally been melting and turning into a white slime. The slime is clogging up my skimmer, reducing the flow in my overflow, and sliming up my filters. The corals, fish, and inverts are all fine and the water quality and clarity in my display tank is normal. The only thing that I have changed in the past few weeks was an increase in my calcium dosing because my corals have been using it up so rapidly. I dose with aragamilk and kalk.

What would cause these sponges to all of the sudden go from rapidly increase to all dying off at once. Will it affect my water and what can I do about all of this?