VeipaCray wrote:Yes fill the media trays with as much bio media as will physically fit. You don't need to use the Rena stars, they are expensive. Any brand ceramic media will do. Aquatraders.com has cheap bio rings.
It's ok if the purigen bag doesn't cover the entire tray. The purigen is the least important filter media.
Yes, if you aren't pre-filtering your water through carbon, it's best to include some carbon along with the purigen in that tray.
Biochem zorb is essentially purigen and carbon mixed together. Purigen is synthetic resin beads. Biochem zorb is also synthetic resin beads mixed with carbon. The only problem with zorb (aside from price) is hat you can't clean it and reuse it like you can with having a seperate bag of purigen.
Toss the bag of zorb in with the purigen for now and you'll be good in the chemical media tray.


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