Tank crashing...could it be due to these?

[Aquattro]

Originally Posted by mediaone

Brad Wrote "I also know it wasn't coming out in any appreciable amount."

I am curious how you knew that phosphate was not exiting in an appreciable amount? Any interesting test I don't know about.

No, nothing cutting edge. Since I use no macro algae, and kalk only sparingly, this makes me confident that PO4 input is greater than export. The import is confirmed by fairly heavy feeding on my part.