My home aquarium

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As a minimum 40 litres per goldfish. So thats 1 x 1000 litres, or 10 x 100 litres. Really you should be 120 litre for 1 goldfish, then an extra 40 litres for each extra goldfish. And that's minimum, that's not going to give much quality of life.

What size aquarium are you getting?

Do you have a garden you could dig a pond?

Keeping 25 goldfish in 100 litres simply isn't healthy, they will be having such a poor quality of life I'd consider culling numbers. Keeping that many fish in anything other than a decent sized pond is going to take up an awful lot of space inside and tens of thousands of £s. And they are just going to continue breeding and make the situation worse and worse. You need to make some difficult decisions. You arent likely to find anyone to take your goldfish in the numbers you are talking.
 
I don't see how to many fish has anything to do with snails. Fish do not produce smails. They had to have been brought in some how then not all removed when you cleaned the tank. As far as the population of your fish it takes two (2) to tango get rid of one and problem solved. This is one time a bigger tank just means a bigger problem. This has already got out of control and is only going to get worse. You have a tough but clear dicision to make. Keep in mind I don't have angles or snails so I could be wrong about all of this.
 
As a minimum 40 litres per goldfish. So thats 1 x 1000 litres, or 10 x 100 litres. Really you should be 120 litre for 1 goldfish, then an extra 40 litres for each extra goldfish. And that's minimum, that's not going to give much quality of life.

What size aquarium are you getting?

Do you have a garden you could dig a pond?

Keeping 25 goldfish in 100 litres simply isn't healthy, they will be having such a poor quality of life I'd consider culling numbers. Keeping that many fish in anything other than a decent sized pond is going to take up an awful lot of space inside and tens of thousands of £s. And they are just going to continue breeding and make the situation worse and worse. You need to make some difficult decisions. You arent likely to find anyone to take your goldfish in the numbers you are talking.
Wouldnt that depend on the snail. My snails lay but eggs dont hatch because they brine.
 
Wouldnt that depend on the snail. My snails lay but eggs dont hatch because they brine.
The post you referred to had nothing to do with snails. It was addressing a significant overstocking issue that IMO was more important than the pest snail infestation.

Yes, you are correct that not all snail species will breed and over populate an aquarium. Yours are presumably nerite snails that will breed in freshwater but need brackish water for the eggs to hatch in. However because of the difficulty in breeding these snails they aren't likely to accidently to end up in your aquarium, and if they did you could quite easily control the numbers in a freshwater environment where they wouldn't continue to produce more snails. The sorts of snails that are accidentally introduced to aquariums are considered "pest snails", most often pond snails and bladder snails, and ramshorn and Malaysian trumpet snails are often considered pests too.

Many of these pest snails species are hermaphrodite and can reproduce asexually of there are no other snails to breed with, so it only takes one snail to be accidentally introduced to the aquarium to result in 1000s. This isn't the case with nerites which need individual male and female snails to reproduce successfully.
 
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