ryangorney
Reefing newb
Hi Everyone, thank you in advance for your help. I currently have a two year old 90 gallon Saltwater aquarium. The tank is inhabited by: Snowflake Eel, Porcupine Puffer, Box Fish, Butterfly Fish, Wrasse, Clown, Mandarin,a few angle fishes, starfish, and two sea urchins. All fish have been healthy for months but today I noticed that three of my four bio wheels (I have two bio wheel 400 units) were not spinning and I am not sure how long this was happening. There were some particles stuck in the plumbing and they are working now but my concern is that they are failing and may have already lost some of their biological buildup. The bio wheel units look fairly beaten up and sound horrible. I am wondering what I should replace them with and what the process should be. In addition to the bio wheels I have a large Red Sea Berlin protein skimmer, about 100 pounds of live rock, and great water movement through several power heads (those three items are clearly not changing). I am heading to the LFS tomorrow but want to be educated on best options to replace the bio wheels. So far the Ammonia level is just slightly higher than normal and my Nitrite levels look like they always do (just below 0.20). I would ideally like something that better handles the Nitrite and will be reliable for years. I do a 20% water change every 3 to 4 weeks as well. Thank you in advance for any suggestions, I want to have the least impact on my fish and give them a more reliable filtration system.