Hmmm interesting question. If the price were right and the volume large enough it might be cost effective, but I rather doubt it. That size will be consumed quickly by predators and you would have to buy so many of them to get the benefits, I doubt it would be a positive cost/benefit ratio.
I haven't seen any studies to confirm this but I suspect it takes a lot of Tilapia to clean out the algae that was consumed in my ponds...a whole lot of Tilapia. Not many fertile reproducing ones , but very many sterile ones to do the job. They are just incredible at reproducing.
