Amoore311
New member
Okay so I'm a newb to this hobby. I have a biocube 29. I filled it in February. Since then I have struggled with my Nitrates and Phosphates. I'm doing 20% water changes weekly. I feed every day, once a day but not that much. I still have Nitrates at 25ppm and phosphates at .1ppm. Every string in every aquarium web sites talks about removing the bio balls and replacing them with a media basket like the in tank one and running some purigen and chemipure. I've made the purchase for the rack and filter media. My question is do I remove all of the bio balls at once or do I need to spread it out? Thanks.
Do not take all of them out at once if you have any livestock in the tank. Take like 30% out, wait a couple days, repeat, etc. Your biological bacteria still colonize the bioballs regardless of whether they are collecting nitrates or not (they probably are). So you are in throwing away a percentage of your biological filter with each toss of the bio balls.
The couple days in between gives those bacterial colonies time to grow elsewhere.