Okay... first let me put a disclaimer:
I have never used RO/DI water; I do not have an RO/DI unit. I do know that this strips the water of pretty
First, I do agree, I believe tap water is the issue. If your city uses chloromines to clean the water, it will not show up on an ammonia test.
I agree with Dave. To your questions...the black leaf [actually frond, since this is a true fern] could be nitrogen deficiency, or it may be brush algae.
Eh... I've grown Java fern both ways. If you have driftwood or rocks, they will indeed attach themselves over time if you tie them loosely to it. As long
I'm glad to be here as I find I have a hundred worries and questions as I'm starting my first Freshwater Aquarium. I've studied on the internet like a