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

[Aquattro]

Mason, let me know when you figure it out, I've been dealing with this for months. I have had rust in th etank from my steel stand, but it's never been an issue before. Some people are suggesting high alk as a source of this problem. I've treated the tank with antibiotics, lowered the temp, added PO4 sponge, etc. Things may be looking better, but it's too early to tell. And if things have turned around for me, I couldn't tell you what did it!!
If you come up with something, let me know !