Acans receding - looking for suggestions on possible causes

[gregzz4]

Well, it looks like we're going to lose all 3 of our aussie acans
The recession has sped up a bit and I estimate that they'll all be gone in another week

The ONLY other thing I've changed lately is;
I was using GFO from Chin Lee's group buy last summer. It ran out, so now I'm using BRS hi cap

I'm going to do a 15% WC tomorrow and I guess I'll cross my fingers ...