Is it possible to breed fish in the same tank if I use marbles or something?

Answer 1

The marbles will have bacteria grow on their surface, just like any other substrate if they're in the tank for a sufficient time, although they wouldn't be as good as something smaller with a rougher texture (has to do with surface area).

All the marbles would do is keep the eggs from being eaten IF the fish are egg-scatterers. They won't do anything to protect the eggs if your fish are bubble nesters, lay eggs that stick to other surfaces, or are livebearers. And once the eggs hatch, any fry swimming above the level of the marbles is fair game for lunch. Plus, you're have the problem of cleaning the substrate with the eggs/fry in it. Better to set your fish up in a separate spawning tank and remove adults that don't provide parental care after the eggs are laid.

Answer 2

I'm afraid that your question doesn't make much sense. Are you talking about the substrate in your tank? If you remove the substrate or only use marbles, you'll remove the beneficial bacteria that keeps your tank healthy. You can get some plastic grass or, even better, keep your tank planted so that the fry will have places to hide when they're tiny to avoid being eaten.

I do have to wonder why an inexperienced aquarium keeper would want to breed fish - why not work on your skills as a fish keeper, then start breeding when you're ready to take on the additional responsibility of raising fish?

Answer 3

I think the original poster was asking if they had gravel and marbles on the bottom of their tank would the eggs or fry live. I have read somewhere online about this.. I'll copy and paste and then give you the link.

Cyprinids (Egglayers)
Most Cyprinids, which includes Barbs, Danios, Rasbora, and Black-tailed sharks, are free spawning. This means they will discharge the eggs and sperm into the open water.
Usually an increase in temperature and feeding plenty of live foods will trigger spawning. The eggs will then adhere to whatever they come in contact with: leaves, decorations, gravel, etc. The eggs hatch quickly, usually within 30 hours at which time the fry can eat finely powdered flake food followed by baby brine shrimp after a week or so.

The parents will eat the eggs and the fry so some means of protecting the eggs is needed. To accomplish this you can use spawning grass, marbles in the bottom of the aquarium, or a grating that the eggs can fall through but the parents cannot. After spawning it is a good idea to remove the parents.

One of the notable exceptions to this method of breeding is the practice of the Bitterling, Rhodeus sericeus amarus, who protects the eggs within the Mussel and defends them after they have hatched

Answer 4

If you want to breed your fish then you need to buy those little holding containers to put them in while still in the tank. It clasps to the side of your tank and that's where they will mate and the babies should stay in there too unti lthey are big enough to leave otherwise your other fish will eat them including the mom and dad fish. if you have rocks or marbles at the bottom of your tank doesn't matter.

Answer 5

huh? what are you going to use the marbles for??

if they are on the bottom of the tank, it depends on what type of fish you are trying to breed. most dont lay their eggs on the floor.
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Answer 6

What?... I have lots of marbles in my tank, and they are doing well...


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