Elaine T wrote,
The only place long, fluffy
hair algae grows in my whiskey barrel pond is in part of one barrel
where the water is relatively still for the water lily.

Hair algae is primarily a problem when there is excess iron in the
water. Your water come from a well (?), or you might try reducing the
dosage of fertilizers containing iron.

I have clumps of java fern sitting in the filter outlet, and
they grow faster than the java fern on the other side of the tank.

In low nitrAte situations, along with algaes, some plants can get its
nitrogen from the air. Under a water return location, I can see where
it can get its nitrogen from the air.

I generally put crypts in moving water too, since all the pictures I've
seen of them in nature is bent over from the current in fast-flowing
streams. They seem to do fine that way.

I didn't say _all_ plants do better in slow flowing or still water - I
said _most_ plants......
I didn't say _all_ algaes do better in a turbulent enviroment, but most
do. Both blue-green slime algae and hair algae does great where there
is little to nill water movement. ................. Frank