Not a clue about brown slime.... but ~
Do you have any water tests that you can do?
And post exact numbers here for the chemical
wizards to take a look at.

You really are running a large 300 gallon, outdoor aquarium
with fish, and turtles, as I recall,
which, without any plants, if you look at it that way
there may be some answers.

Turtles make significant waste, so I'd want to
know how your filter is doing, that is where the
water tests come in.

If the brown slime is algae, then algae feeds mainly on sun,
fish and turtle waste, blown in dirt, too much new water,
plant debris. Plants help use up much of the excess
nutrients when dealing with algae. If your turtles eat
all the plants, set up a seperate pond, plants only to
route the water through. Is also a good way to grow
stuff to keep ahead of turtle consumption.


kathy :-) www.blogfromthebog.com
this week ~ introducing Miss Lily,
a painted turtle

Pond 101 page for new pond keepers ~
http://hometown.aol.com/ka30p/myhomepage/garden.html