Newbie restarting tank

[Elkefko]

Hi all,

I want to restart my freshwater tank. Nothing bad actually happening at the moment, but I’m a bit bored with the current setup. One question though:

Can I bypass the cycling by reusing 75% of the existing water, using the uncleaned medium and filter? I do not have a cycled second tank to house the fish, so I’m a bit in the dark how to do it fast but correctly without losing fish in the process.

If this is an absolute no-go, what would be the safest way to do it?

Thank you!

 

[ZxC]

Just temp match water from the same source as you put in your current tank (likely tapwater), swap all the media over and you're done. Instantly cycled.