[Tackeee]

I have only had FOWLR tanks. I have a friend that would like to get into the hobby but wants to start with FO with no live rock. I have seen tanks like this before but am unsure of what is needed to set one up. I have a couple questions,

1. What kind of filter would you use on a tank with no live rock? Just a protein skimmer or a canister or a HOB?

2. Can you use sand or should you use a crushed Coral Substrate?



These are just a couple questions I have been trying to figure out.

Any help would be greatly appreciated.

[leebca]

WELCOME TO REEFLAND!

The choice of substrate is pretty much up to the owner, unless the kind of fish they want to keep dictates certain substrate size or type.

Without live rock, you will need an efficient biological filter, such as bio-balls or a trickle filter, and a mechanical filter or filter sock to remove debris. Another filter for phosphate removal and to hold carbon would be good. A strong skimmer is also recommended. Total volume turnover should be about 10X per hour of the volume of the system.

The above will produce water with fairly high nitrates, so frequent large water changes will be a part of the maintenance.

[Tackeee]

Could I use a good Cannister filter to satisfy those filter needs along with a protien skimmer?

[pearl_aqg]

You should be able to make it work with a canister filter/skimmer combo. Some of the newer canister models have increased space for biological filtration and features that allow you to easily drain off debris that collects in the bottom and could build nitrates quickly. To be on the safe side, pick a canister that is a bit more powerful than the minimum that you need.

Same as with a wet/dry system without live rock or algal filtration, you'll need frequent water changes to keep nitrates low.

[leebca]

I think Pearl has some good advice. There are many configurations. You want to get some books to get some other ideas.

[Tackeee]

Thanks for all the help!