by DanRad on Sun Feb 25, 2007 7:23 pm
That was a concept that was still very much alive when I got into the hobby in my early teens. The idea was that you used plants to provide the necessary oxygen to the fish -- the fish in turn supplied CO2 and organic nutrients to the plants. Very often no filtration was used. I remember my 10th grade biology class had a small tank with lots of plants and just a few cherry barbs. Only light was morning sunlight from the windows across the room, plus the ambient flourescent lighting from the overheads. It was quite common for there to be a pretty good layer of "mulm" at the bottom of the tank. Algae was generally considered to be a good thing -- you just scrubbed it off the front glass to make viewing easier. Water changing was hardly ever done -- only if you ran into a serious problem. Normally you'd just top off the amount lost through evaporation. You might use distilled water to do this in order to avoid mineral build-up. No one would think the less of you if you used lighting, but incandescent bulbs could add a problematic amount of heat during the summer months -- air conditioning was not common in those days. Filtration was of course available, but mostly eschewed by "serious" hobbyists. I was never that hard core myself -- besides, I liked watching the bubbles! There were of course variations on these ideas. The concept of biotopes was quite popular, and hobbyists went to a lot of trouble to provide live foods to their charges -- more often than not collected rather than bought. Daphnia, tubifex worms, etc. Even plants were often collected from the wild (though mostly soaked for a day or to in permanganate of potash to rid them of wild nasties).
One of the things that gave me pause in this book -- which is largely a collection of anecdotes about many of his animal keeping adventures -- was his description of keeping breeding pairs of H. cyanogutattus. Have to wonder what he did about plants with those guys!
PS -- You're putting me on, right?!