- several 750ml cylindrical glass containers (with and without top cap)
- different types of substrates: gravel (small to mid-size grains), sand and fertilized soil for aquarium (neutral pH)
- different types of plants: low maintenance and fast growth
- different types of water: tap, filtered and distilled
- different types of fertilizers: soluble, solid and ammonium hydroxide 25%
- different types of light sources: 0.2 to 10W, 3000K and natural sunlight
Basically, the experiment consist of trying to find a configuration and a proper amount of light and fertilizers that would increase the lifespan of the plants. However, as much as I've tried (for example: 0 to 50ppm ammonia, 4 to 24hr/day light, ...), nothing seems to change the following pattern:
- day 1: bubbles whenever there is enough light
- day 2-4: less bubbles, plants, as a whole, are less green
- day 5-7: leaves falling, first signs of algae
- day 8-12: almost no bubbles, some parts of the plants are rotting
- day 13+: the plants are probably dead and algae blooms
What am I missing? Any idea of what configuration might work?
P.S. Of course, the point of this experiment is to minimize the mistakes when going to a full tank.