This blog title says it all: another ..... GRASS GLASS STYLE is a Japanese language blog
dedicated to an aquarium with a beautiful lawn.
It has little to offer but the beautiful photos that You has to find in older posts. The blogger seems not to update the site nowaday and the latest photos show a different aquarium.
Searching in the old posts You can find some good ideas on the use of an external filter for weekly water change . Other suggestions are in the use of buckets ... search for it ;-)