I have used and are currently using aluminium hydroxide binder. I am not concerned with aluminium toxicity since sadfully, they are not on it too long.
Thanks for the info. Appreciate it much! I didn't mean to hijack @TempestsMum thread but our cats have similar values and we both have similar issues esp diet. She has a better vet whom she trusts unlike mine. Ended up I have so many questions to ask members here.