Twinguppy81
Aquarium Advice Apprentice
- Joined
- Sep 30, 2012
- Messages
- 12
Hi guys had my biorb tank set up for around 6 weeks now, got 3 guppies only, but want to do a 100 % tank clean, remove some horrible gravel and add some plants, now if I do this I take it I keep half of aquarium water from tank to put back in ( good bacteria) then fresh water on top???