3 ms·
It's not really closed-loop though, is it? You still need to buy food to feed the fish (and maybe fish food, which will end up in your vegetables, can be contam
by donquichotte 9y ago
It's not really closed-loop though, is it? You still need to buy food to feed the fish (and maybe fish food, which will end up in your vegetables, can be contaminated, e.g. with heavy metals?)
Or am I missing something?
- gbuk2013 9y agoThose closed systems involve growing algae which is used to feed the fish.