Magnesium

What's the magnesium percentage I should look for in cat food? I found the number sharky posted on here once but can't seem to find the thread again.

Foods with less than 0.1% magnesium are what you're looking for. If you're concerned about crystals in your cat's bladder, protein, calcium and phosphorus also play a role. I don't know the numbers though sorry. I would suggest a drinking fountain to encourage yiur cat(s) to drink. If I find those other numbers I will post them.