Review on Aquatic Arts FilterPlus: Enhance Your Aquarium Canister Filter with 400g Bio Media Upgrade Bag/Pouch for Effective Tank Filtration by Tina Cruz

Helped stabilize my 3 month old reef. I've had trouble maintaining a good cycle, even with inoculum. After 2 months the aquarium is very mature with these stones and I only removed all the sand and exposed the bottom 2 weeks ago. No spikes in any way. I'll be making a jug of salt water soon to take the medium sized bag they're in and rinse vigorously to remove all material, although I only have traces of nitrate. I think if I flush the bag every 2 or 3 months or so when cleaning the sump and PS it will help with buildup. Fills approximately a 6 x 4 media pack.