Description of Experimental Set-up

1 water hyacinth is placed in each of the plastic containers containing solutions of different pH values except for the one containing tap water which contains 4 water hyacinth. The  water hyacinths growing in tap water is the control setup. Each container contains 200ml of the solution used so that the water level is high enough to sink the plants’ roots completely. The plants are kept in a place whereby sunlight is sufficient and reachable for all plants, the surrounding temperature is also at room temperature (~26◦C). All plants are kept in a indoor environment so as to shelter the plants away from rain which may otherwise affect the results of the experiment.