I had a Tetra Whisper 10I for almost a year now, and while it does a great job at filtering, the flow is to overwhelming for my Betta. I've been desperately trying to find a filter thats Betta friendly and I finally have.
I can't wait to change filters since my pet has to stay in or around his cave due to strong flow.
I know you can't just remove the old filter and plug in the new 1 as it'll re cycle the tank and harm the fish. The beneficial bacteria would also be removed.
So how do I go from old-new without ruining anything?
I know I could just put the old filter media into the new 1 but its not the same brand, the media won't fit into the new 1.
I was told i can run both filters at the sametime, but I never heard of this. Plz help =)