Is it actually slime your getting? When I turn off my pump and turn it back on I have white stuff come out but it's in like a clump. I don't dose any carbon source.Where do you dose your PhosphateRx?
Also, when you turn off your return pump to do water changes or for any reason. Have you noticed white bacteria slime coming out? I have noticed it lately and think it is from the NOPOX, I am not worried as it is completely gone within 1 hour usually but just strange. Sure doesnt seem to effect my SPS at all either.