I read somewhere on this site that calcium bicarbonate was used to improve caladium tuber growth somehow. I'll look & see if I can find the link again. Doesn't matter though. I talked with my wife again about the stuff available here, & I will be buying a trace minerals mix to add to my plants next week. Also the fertilizers they have here come in other mixes as well. Amazing what 2 weeks can do for improving a language. We misunderstood each other before when she told me there was no other mix available here. I frequent www.exoticrainforest.com all the time to learn about the plants I am collecting.
Once I have my own house here, I will be starting my own compost using the sawdust I got as well as anything organic we have around. I am aware of the acidic nature of rotting vegetation as well as the acidic tea released into the water from this material.
I appreciate the help Masud. I am currently working on this as well as preparing for another trip to the jungle! I am in heaven!