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Marbles in fish tank.
Bacteria grows and maintains.
A cycled tank shows zero ammonia and nitrite and a nitrate reading of less than 40 ppm.
Adding decoration and plants if you re wanting to add plants and decoration to your aquarium you may find the substrate you choose can make a difference.
It doesn t do any harm to the fish.
Yes you can put marbles in your fish tank.
You ve probably also seen fish bowls with a layer of beautifully colored marbles serve as a home for a single betta fish.
If you enjoy fish you can choose to set up a bowl or tank that falls anywhere along the spectrum between the two.
Their use can vary and they do come with some quirks that are good and bad in equal measure.
If your bare bottom tank is fully cycled then there shouldn t be any issues with the marbles affecting the cycle.
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You can add marbles to your tank just clean it well with hot water.
When you see fish stick them in their mouthes they are just sucking on them.
For the most as a decoration point of view marbles are safe to use in fish tanks.
On the other hand if you are breeding fish marbles can be a good substrate because the gaps provide protection and coverage from adult fish who would like to eat the fry.