Quote:
Originally Posted by gracilaria
Hi,
I've been producing large amounts of Gracilaria fertilizing with about equal amounts of NH4NO3 and (NH4)3PO4 once a week. I help produce the Gracilaria for feed for abalone and have been seeing some epiphytic growth of green filamentous algae. Is this a good ratio or should I reduce the amount of phosphate because I've heard the red algae don't require as much/or any of it? What about KNO3? Would the Gracilaria get better growth, less fouling from green algae with KNO3? I'd appreciate any guidance here. Thanks!
Christine
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Reduce the PO4 to a 3 to 1 ratio, and you may be able to work it down from there. While red algae don't require as much I don't believe it can be eliminated all together for Gracilaria. I wish I could be more specific, but it's been quite awhile since I've done any tinkering with macro algaes, and they were never really my field. Cultivation has come a long way since then. HTH. Prof M