Does anyone know if there are any negative side effects from dosing Urea into a marine system? It seems to be a good way to add Nitrate for the benefit of my clams...
Hhmm..I have no idea, as most food clams come from very different waters. Minh Nguyen would be the first guy who comes to mind to ask.
I was reminiscing about "the old days" working at one particular warehouse, and we'd set up a new salt system (some several thousand gallons, IIRC) and we wanted to get it going. I went to call some vendors, come back and find everyone with their flies down, peeing in the salt sump. Had quite the giggles over that for a loong time.
I don't know of any problems that you might encounter off hand. I also don't know if clams can use it directly, or if it needs to be converted into other forms prior to absorption by the clams.