I think EI might be too much, just small amounts of trace and very small amounts of anything else if I use anything else.

I really don't think that even if I EI dosed it would hurt the Fire Belly toads but there is no need since I want algae for tadpoles.

I think that it may be more a need to find the nutrient levels naturally occurring in a frogs native habitat. Only then can someone know for sure if there may be an adverse effect to their frog friends.