Why dirty water kills frogs?

[Entoursis]

I would probably figure it out (does filter or pump helps, and how often should the water be replaced), coz I have good probability to measure everything in a lab, if I knew all the stuff I should look for. And in addition, I'll need some data regarding the critical concentration of the chems, because measuring the pollution size and speed of it's increase won't be enough to say how often water is to be switched. Without this info I would probably be forced to use the concentrations of natural ponds as supremum, which is most likely far from critical.

[bullfrog1986]

Im thinking of making a 50/50 with a filter but it does make me wonder the question of does the water ever really need to be replaced? or can the filter work at max to ensure the water is always clean enough to never be changed.. something that needs more research. It would be nice to think a filter could do this however Im still unsure. thanks

[ejh805]

With how much of a mess pixie frogs make, youre going to need a filter and youre going to need to change out the water at least weekly. The filter will help but it won't do all the work.

[deranged chipmunk]

i'm not really understanding the question properly, but i interpret this as you are looking for the concentration of ammonia that would kill the frogs for what purpose? to hold off in changing the water until it reaches near critical levels? easier to just stick to a routine of changing water on a weekly or bi-weekly basis.

i have yet to run across any aquatic plant that releases toxins into the water column, so no need for worry there.

and a filter would not keep the water supply clean and perfect indefinitely. minerals are used up constantly from the water and need to be replenished. water changes are not just about keeping clean water.