View Full Version : Iron dosing for Macroalgae (Eucheuma cottonii)

03/21/2012, 12:33 PM
This thread is the continuation from my previous thread on advanced topics about growing a specific macro algae called Eucheuma Cottonii in a small scale closed system farm. This Macroalgae can be used for human consumption plus its quite attractive to look at.

I have been successful so far in growing Caulerpa algae without iron suplement. We call them here grape algae. I dose crushed/blended mussels for nutrients as they are cheap once a week and my phosphate on this pool has never gone above 0.05 and nitrate has never gone above 0 on salifert. :D Behold the power of macroalgae, hehehe But I have heaps of them too so yeah...hehe I'll put up some pics. Obviously my caulerpa does not have green bright color although they grow like mad everywhere, but its more to dark green color.

Randy has a recipe using ferrous sulfate heptahydrate and sodium citrate dihydrate, but I am worried I cant find these in my local chem shop. Is there any other way without using expensive aquarium use chemicals as I will be building an approximately 10 meter square big of marine pool for starter for this project? i was thinking of putting a block of iron slab in this pool and let it rust, would this help? Fergon was also suggested but i doubt we have it in this country.

03/21/2012, 10:55 PM
I'm not sure what might be available where you live. I'd check some human and freshwater pond supplements as a starting point. If you can post ingredients, we might be able to help.

03/22/2012, 06:56 AM
will do Jon