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

[Aquattro]

Originally Posted by Son Of Skyline

Brad, did water changes not help at all in your case? What kind of water changes (outside of regular maintenance) did u try?

I did weekly 20g changes for about 6 weeks and I found that made it worse. Although stopping these frequent changes didn't make it better. I am going to do a 100g change tonight or tomorrow, just for fun. Overall, my tank seems to be looking better for the last 2 weeks.

What type of PO4 sponge did you use? I am using Phosban, which lasts a lot longer than the Al based products.