Phil Stevens wrote:I think the leaves can work, but if you can get something in there along with them that has lots of nitrogen they will work better. What you're trying to get is a sort of anaerobic composting process which jumps-starts the formation of cryptobiotic slime underwater. That's why grass clippings work so well...they have a low C:N ration (which is why they heat up quickly if you pile them).
Are you ruling out manure because you don't have access to any, or because of other reasons like ick factor? What about coffee grounds? Shouldn't take too much for a small pond, as the leaves will be provide the bulk.
Both lack of access/funds to buy and ick factor.
My in-laws go through a lot of coffee. I could try asking at coffee shops or the University. Personally, I refer to coffee as “the stinky stuff”. I never acquire a taste for it. My spouse will drink it socially, but doesn’t enjoy it.