I used a google converter and I get about 30
gallons for 110 litres.

That's good for a couple of minnows.

I'd empty the pond, clean it out. Put in
new water, put in LOTS of plants and let
it go for a couple of weeks.Do not use
any chemicals to fight algae, that just
makes lots of suddenly dead algae to
feed the next algae bloom. Put in two
minnows and let any algae bloom pass.

Also post your exact numbers from any
tests. There is a difference between
readings that are fine and reading which
could impair the functioning of your pond.

kathy :-)
www.blogfromthebog.com