yes I did, I am a terrible over feeder. I feed the tank at min. 5-6 times a day. comes with the territory of owning tangs I am afraid. So I quickly realised that changing my rowa every 6 weeks was not going to cut it. I bought the Hanna egg Phos checker and changed out rowa until my numbers reached 0.03. I now test weekly and the min my numbers at 0.05 or higher I change out 1 of the 2 rowa reactors. To keep numbers ok. and steady.
I actually think this was my major problem with browning when I first stated buying.