ok so i have been using Aqua Star to treat my tap water for years and it seems to no longer be available from Age of Aquariums, and i can't find it anywhere else.

I've been very happy with it but need something asap as i'm almost out. It's quite strong and has worked very well with me for a long time.

I'm looking for suggestions on what else to use please.

Aqua Star claims to
Aqua Star acts fast. Within Minutes, it neutralizes chlorine, chloramine,
toxic ammonia and heavy metals, making tap water safe for fish. Adds protective Slime coating.
Aqua Star can also be used to reduce dangerous ammonia levels in established aquariums or when transporting fish.
Neutralizes 5ppm chlorine, 2ppm chloramine, 1ppm ammonia.

I have used Prime before but found aqua star to be better (less fish loss especially when breeding and growing out fry).

Thanks in advance.