I'm starting a new tank--making the jump to medium lighting--and I'd like a good, inexpensive, and relatively easy to find substrate. The high CEC of Safe-T-Sorb seems ideal for this project and it fits the aforementioned criteria. There are apparently some problems with it though--its dirty, troublesome to plant in because its too light, and can break down overtime. Could this be solved by capping it with some black blasting sand? Will the desirable high CEC be nullified in any way by capping it with sand?