Um, low-tech planted goldfish tank using Walstad principles can be found
here...

http://mike-edwardes.members.beeb.net/plant/lotech.html



I've seen that page. It's a cool tank.

However, you will note that he says the only plants he can keep in the tank are
hornwort and one species of Val, because the goldfish "destroy" any other
plants he puts in.

If you must keep goldfish in your planted tank, it's possible. They don't
generally eat anubias, and java fern is sometimes safe, too. But it's not
easy, I don't recommend it for beginners. It's awfully frustrating to have
goldfish eat all your expensive new plants. And worse, if no plants grow,
algae will take advantage of the "natural" light and all that goldfish poop.


Leigh

http://www.fortunecity.com/lavender/halloween/881/