Hi Jay,
Perhaps if the pot is standing in a tray, it will hold on to
the tannins, ect. for longer? Water that washes through the soil
(peat) flows out the bottom and into the tray. Then, as the plants
drink, some water is pulled back into the pot. Of course, you will
still loose stuff over time, but probably not as fast you think...
Growing Sarracenia in a bog seems to help avoid this, with the sphagnum
making hummocks, the soil is renewed.
Dave Evans NJ, USA :-Q*