Do i need to cycle?

Hi! Im moving everything from an established 30 gal to a 50 gal even the filter and gravel. Do I need to cycle the new tank?

 

No, unless you add new fish right away.

 

Just watch your parameters and add fish slowly to let the bacteria keep up.

 

As others have said, your new tank should be able to handle the same bioload that was in the smaller tank, so if you plan to add more fish do it slowly and you shouldn't have any problems.

 

Thank you all. It is just for 2 fair comets lol. They're special. Started in a 5 gal, then 20 gal, then 30 gal, and now a beautiful 50 gal. Good to know I can transfer everything. They already had a 50- 75 gal filter. I will run a canister filter also until it builds its own colony.

 

I know you probably already thought of this but I feel the need to mention just in case. Just make sure you don't rinse anything in regular water while switching tanks. You never know what people know and what they don't. Also, use your water from your old tank. Sorry if you already know this.

 

I know you probably already thought of this but I feel the need to mention just in case. Just make sure you don't rinse anything in regular water while switching tanks. You never know what people know and what they don't. Also, use your water from your old tank. Sorry if you already know this.

I will respectfully disagree. While I'd never suggest rinsing filter media from a relatively new tank in tap water, it's safe to do so with established tanks.

You don't have to take my word for it. See

. He's a lot smarter than I am.

 

Honestly I can't think of one thing I use un-conditioned water for... oh wait... when I get new plants I bleach dip them lol then soak in treated water.

I always use tank water I'm removing to clean up any media. Just in case. To me, my bacteria colony is GOLD lol

 

I will respectfully disagree. While I'd never suggest rinsing filter media from a relatively new tank in tap water, it's safe to do so with established tanks.

You don't have to take my word for it. See

. He's a lot smarter than I am.

So, you posting this has a few problems. First off, this was not a post asking how to clean sponge filters. They were asking about upgrading to a new tank. In the video, with his report from Australia, he was stating that if you rinse your sponge filters in tap water very quickly then your not going to kill enough bacteria to ruin your cycle. Secondly, established aquarium could mean different things to different people. I've had people come in to buy fish and tell me that there tank has been cycled and when I ask how they said they set it up and let it run for a few days. As we all know, this is not cycled. When they said they had an established aquarium that could mean they had it running for 2 months, not enough time to establish a lot of bacteria. Also, he was just rinsing out the sponge filters and not rinsing everything in the tank to switch to another tank. If you rinse your filter sponges, even if you kill some bacteria then you still have bacteria in your gravel and other items in your tank and they will reproduce again. If you rinse everything in your tank to put in a new tank and the tank hasn't been running long enough to have a large bacteria colony, and you add more fish (the main reason people upgrade to a bigger tank) and increase your bio load in the process and decrease your ammonia and nitrite eating bacteria then your fish are in trouble. Your fish will get an ammonia spike on top of getting used to a new tank, which is very stressful for fish. I think maybe your comment had a place on another post but maybe not this one. That's just my opinion though. When switching to a larger tank you need every ammonia and nitrite eating bacteria you can transfer. They keep your fish healthy and happy and alive.