by britta
Nutrients from your fishtank?
January 21, 2010 in Materials and Resources, Plants by britta
Derek Stobbard wrote me an email with this idea for nutrients:
“Here’s an idea for natural nutrients: Keep fresh water fish – goldfish, for instance. Once a week empty one fifth, to one third of the water from your fish tank and replace it with new water (preferably water that has sat in a bucket [...]
