coz I'll use Wet/Dry with Bio Balls with Mangrove. I think it will do the same job as the skimmer......can i just ask why you wont use a skimmer?
and when you say fish farm...do you mean breeding them?
Use a protein skimmer. SH
/www.charterhouse-aquatics.co.uk/catalog/deltec-3070-external-skimmer-p-3009.html