some info on golden apple snails for you
Apple snails are known to be the biggest living freshwater snails on earth.
The most common snail for aquariums being the Pomacea bridgesii.
There are many different species of snails (so be careful what you buy) some will eat all your plants.
Apple snails come in a variety of different colours yellow being the most common colour readily available in the UK, I also have jade, and currently awaiting, blue, ivory, burgundy and my most wanted purple, all these colours are common place and relatively cheap in the states, but with the introduction of new import and export licensing laws in the USA, fines of $2'500 can be given for importing or exporting snails without a licence they can prove expensive to obtain. The colours are obtained from mixing the body colours with the shells natural colour. For instance, body colours are black and white, then for example, blues, are black snails with Ivory shells, the black body of the snail shows through the light ivory coloured shell giving a dark blue colour, Jades are yellows and wild browns crossed.
They are considered vital for some ecosystems, being the main food source for many birds and in particular the main diet for the endangered snail-kite, they can be found in ponds, swamps and rivers in warmer climates, and in Florida where the population is rife they are considered a pest problem.
Many snail species are hermaphrodite, apple snails are not, and need both male and female to reproduce, they lay their eggs in clutches an inch above the waters surface, if you don’t wish to breed them simply remove the eggs. The eggs will take between 2 and 3 weeks to hatch and need to be kept moist, and always out of water, otherwise the embryos will drown, the hatched baby snails can be kept with the adults and will eat the same food straight away.
They thrive better at higher temperatures and should be kept at 65 to 82 deg, and temps below 65 should be avoided, the higher the temperature the faster your snails will move, eat, mate, eggs hatch, etc, incidentally snails don’t do anything fast.
They can tolerate poor water quality but need a ph level of 7 or above for shell development. They can also be a good indicator of low oxygen levels in your water as they will frequently rise to the surface and breathe through their siphon if you have low oxygen levels in your water. (That and dead fish).
Apple snails live peacefully with most fish species and can be used to help keep the aquarium clean of algae, but don’t expect them to completely clean your tank of all the algae, you have to do some of the work.
Although they will eat plants, they prefer soft vegetables and will tackle most varieties they will eat dead and rotting plants above fresh green ones, so thus being a good choice for an aquarium equipped with a collection of water plants. What is more, they will starve to death in the middle of vegetation if you don’t provide them with enough food. Apart from vegetables (I feed mine, spinach, broccoli, cucumber, lettuce, banana) they also do well on any kind of fish food, and love algae flakes and the odd prawn (peeled and shelled), Tesco's finest of-course, to keep your expenses down you can also feed them pond fish food.
I find them very useful in my fry tank, eating left over food, and cleaning the tank, you can see their little pink tongues licking the glass. They do make a small amount of mess themselves, I notice it in my fry tank as its clear bottomed and has no substrate, but in the planted tank I don’t see it at all. They will even feed on insects and other smaller snails and their eggs, so all in all I think every tank should have at least one, not to be mixed with clown loaches though.
The ratio of one medium size snail per 10 lts has been recommended to me but since they can grow to the size of tangerines I would recommend no more than one snail per 25 lts maximum.