Hello Oscarpp. Congrats on getting a new tank for your babies!
Water doesn't contain the necessary bacteria needed to cycle your tank as the bacteria isn't free swimming but attached to all surface areas of your tank. The highest concentration of good bacteria being in your filter and your substrate.
I recommend adding some filter media (floss, bio cubes, tubes, sponges whatever is in your old tanks filter) from your established filter on the old tank to your new tanks filter. This will help to SEED your new tank with the bacteria you want to maintain your cycle. You can also take some of your gravel/substrate from your established tank, add it to never seen soap nylons (pantie hose) and place it in the new tank. By placing it in the nylons you can remove it easily after a few weeks. ( I recommend leaving it in the new tank for 3 weeks). You can also use anything porous, decorations etc to help seed the new tank as well. However, don't remove so much from the old tank that it causes it to go into a mini cycle with increased
ammonia levels.
This should pretty much give you an instant cycle. This isn't always the case so keep an eye on your ammonia,
nitrite and
nitrate readings. Even if it isn't an instant cycle it will help to reduce the amount of time it takes to cycle. Be prepared for water changes just in case.
If you do decide to use some of your water from your established tank, I suggest adding the old water, just a gallon or two, add the babies and then add the fresh water slowly. By using some of the old tanks water you can add your fish to the new tank and not have to
acclimate them as this point. You have to keep your
pH levels in mind too. Sudden changes in pH can be fatal to your fish. The new tap water (
chlorine removed) should have the same pH (or as close as possible or higher) as the water in the tank. Also keep in mind the water temperatures and keep them as close together as possible.
Best of luck and keep us posted!
Ken
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