Glutaraldehyde is a very nasty chemical - it's an analogue of formaldehyde, which is used to 'pickle' preserved tissues for labs, and used in embalming fluid. Glutaraldehyde itself was used to sterilise medical equipment, until it was discovered to be a neurotoxin - I know nurses who had been exposed to it for years (before it was banned because of it's toxicity) who now sound drunk (slurring their words) or have tremors.
It is a very effective steriliser, but I would not expose any living thing to it, especially axies who absorb chemicals through their skin. For fish who only live a few years and have scales to protect them I can see it's use, but not for axies.