Re: No ammonia, no nitrite, repeated fish kills
I doubt that it was the wood, it won't lower ph that much. The only way I would think driftwood would do something like that is if it was gathered by you and may have been contaminated with pesticides but the wood was purchased.
I would still like to know the gh and kh of your tap water as it sounds more like an unstable ph. Also have you been getting any nitrate readings at all on this tank. If not the tank isn't cycled.
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