10ml/ Met14 per 55gal.. 3 weeks for an experiment (long story).
no fish deaths, no Nerites or garbage snail deaths besides usual attrition. (w/ or w/out glut)..
Platys birthed many fry all (or most I suppose is more correct) survived and healthy.
Would be concerned with this level w/ egg layers.
May have melted one plant (species ?? but a very slow growing dwarfish sword type thing).
Hard to tell, that one's been sensitive to a lot of things.
Not a recommended level for that long of a time.. but I still highly recommend it for emergency algeacide treatment and occasional prophylactic measure.
"Normal" dosing levels are much less effective (as to boarder on useless in an emergency situation).
Long term effects on fish??? but suspect most will have something else kill them first..
As to CO2 substitute.. never used it for that except if one of the regs/systems go down.
Never noticed any plusses or minuses for short term use.
Many have dosed on much higher levels 1ml/gal Met14 and tanks lived to tell the tale..
There is no decent "science" (in aquariums)regarding the effects besides the current papers about general toxicity levels to various "groups" in water supplies.
Lets just say I've read a lot worse about other chemicals.
I'll close w/ saying it is a relatively toxic (skin sensitivity) chemical and needs to be treated as such..(just a disclaimer..
Ecological "persistence" is extremely low..
Keep in mind this is from a "Producer"
Glutaraldehyde is not expected to bioaccumulate in aquatic or terrestrial organisms based
on the low log octanol/water partition coefficient (-0.33, -0.36). Taken into account the
low bioaccumulation potential and ready biodegradation there is no need to further
testing or risk assessment of secondary poisoning.
Body tissues: waived (BASF, Dow) It is technically
impossible at this time to analyse glutaraldehyde in
animal tissues as the glutaraldehyde will react with the
biological material, followed by rapid metabolisation and
suggest reading the whole thing for the bad stuff..