Luches, I was hoping you would respond, since I saw in another thread that you are in Thailand. I will PM you, but I'll also reply here.
We thought it might be leaf miners, but we were surprised they attacked the seedlings so quickly. That's why we wondered if something was in the soil. If we can solve the immediate problem with Aphid nets, that will help greatly.
As for boiling and filtering the water, that's not feasible in Cambodia -- certainly not at the economic level we're aiming for. Even filtering is a tall order.
We are concerned about testing the water, mainly because the cost of "surprises" (e.g., starting over") could be so high. We're thinking the levels of ammonia in the fish pond could be reduced by aerating it, but we don't know anything about the pH, etc.
Anyway, these details could stretch out. I'll PM you from here. Thanks.
If anyone else is working on hydroponics in SE Asia, please let me know. I'd love to have more people to converse with about these things.
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