I live in Brazil. I have a 52 gallon tank. It has small common species such as molly. The PH is very alkaline(7.5 - 8). The fish are healthy. I bought some plants: elodeas(Egeria densa). They were growing fast and becoming tall. Some reached out the surface.
But a lot of snails showed up. Uncountable snails. I killed some that were on the glass, however there were a lot, so I went to the store and bought a product that has
Copper Sulfate, and Iron Sulfate on its composition. The salesman said to apply one drop for each 5 five liters. So I did it, for three times, with 24 hour between each application.
After that the plants start to die. The leaves became brown and are falling.
I think the product is the cause because they were healthy and growing so much before that.
Someone knows if the mentioned elements of the product would be the cause?