33 hex with two 303 canister what to put in for media?

[damtrees420]

just trying to start a seahorse tank i bought two 303 canister the older gray ones and just wonderin if i will need both couldnt hurt right depending on how much flow will be in the tank ? as well i am wondering what kind of stuff to put in the chambers not to sure how to run it with out a sump as far as what media i can put in them thanks again ther will be about 30 pounds or so of lr in the tank as well

[intarsiabox]

I have a little HOB filter on my nano with a filter sponge, GAC and a phosphate remover such as Chemipur Elite in it. I have crystal clear water and no bad algae, mind you I also keep up with my water changes. You could put the same in the canister. I would only use one filter and add a powerhead if you need extra flow as it costs more to double up your media needlessly and you will also have more tubes in the tank that detract from its natural look. Keep in mind that seahorses aren't good swimmers and a low flow tank is best for them.

[Wingin It]

maybe fill it with some LR rubble and some activated carbon