Planted Tank Guru
Join Date: Jul 2008
Location: East Lansing, MI, USA
Sorry, I was at work with a short attention span earlier. I don't believe algae would be able to get established in a discus tank given the massive water changes. A quick weekly wipe with a sponge should clear things up nicely.
As for the pot, it looks like a bonsai pot to me. If you can't find it in one of the on line Bonsai catalogs, perhaps someone at the Department of Ceramics at Cranbrook Academy could help. Someone there will either make it for you or help you find a source. It isn't hard to get the name of a potter from the art department at MSU. There is a potters guild here as well.