Hello; First is that allowing the dead plant leaves and parts to either decay or be eaten by snails pretty much keeps the nitrates that are bound up in the plants to be released back into the tank. I harvest damaged or dead leaves by removing them.
I believe the plants in question are called java fern. I have some and find it grows slowly and does better when shaded or in low light.
Were the plants with dead leaves mine I would trim the dead bits away and hope to save the rest.
I have kept snails in tanks for decades. The ramshorn and MTS snails seem to be more of a benefit, I have noted that when ramshorn get to be large ( say over the diameter of a nickel) they can do some damage to more delicate plant leaves such as amazon sword. This is not usually much of an issue as they tend not to get this big very often.
As to the pond snails. I had some in a tank a while back along with some Ramshorn and MTS as well as a kuhli loach. I am pretty sure the pond snails have either been out competed by the other snails or are more easily taken by the kuhli.
One last note. It has been my experience if a tank had a lot of snails that I have been overfeeding.
I believe the plants in question are called java fern. I have some and find it grows slowly and does better when shaded or in low light.
Were the plants with dead leaves mine I would trim the dead bits away and hope to save the rest.
I have kept snails in tanks for decades. The ramshorn and MTS snails seem to be more of a benefit, I have noted that when ramshorn get to be large ( say over the diameter of a nickel) they can do some damage to more delicate plant leaves such as amazon sword. This is not usually much of an issue as they tend not to get this big very often.
As to the pond snails. I had some in a tank a while back along with some Ramshorn and MTS as well as a kuhli loach. I am pretty sure the pond snails have either been out competed by the other snails or are more easily taken by the kuhli.
One last note. It has been my experience if a tank had a lot of snails that I have been overfeeding.