Some people like snails in an aquarium and some people do not. But let's understand what they achieve.
Snails do not contribute to the bioload provided they are not being specifically fed but only eat what is already in the aquarium. The small helpful snails like pond, bladder, Malaysian will eat any and all organic matter. This includes fish excrement, dead plant matter, uneaten fish food, all of which is already there contributing to the bioload. And this is beneficial because it breaks down the organics faster so the bacteria can get at it and deal with it. Snails get everywhere, and some burrow in the substrate. This is beneficial, and not in the least detrimental.
Snails will eat algae but not to the extent that they will control problem algae, so it is minimal. But in most cases this is a benefit. As for eating fish eggs, in most cases the other fish will achieve this before the snails can ever get started. But even so, don't have snails in a breeding tank if you want eggs/fry.
The snails will be at the number according to the available food; if they have no food, they will not survive and increase beyond that level.
Snails do not contribute to the bioload provided they are not being specifically fed but only eat what is already in the aquarium. The small helpful snails like pond, bladder, Malaysian will eat any and all organic matter. This includes fish excrement, dead plant matter, uneaten fish food, all of which is already there contributing to the bioload. And this is beneficial because it breaks down the organics faster so the bacteria can get at it and deal with it. Snails get everywhere, and some burrow in the substrate. This is beneficial, and not in the least detrimental.
Snails will eat algae but not to the extent that they will control problem algae, so it is minimal. But in most cases this is a benefit. As for eating fish eggs, in most cases the other fish will achieve this before the snails can ever get started. But even so, don't have snails in a breeding tank if you want eggs/fry.
The snails will be at the number according to the available food; if they have no food, they will not survive and increase beyond that level.