How many plants do you have in your tank? If you don't have many plants the ones you have may not be enough to absorb ammonia & nitrates. I'm not an expert, but plants don't reduce nitrate too much but they do seem (in my experience) to shield nicely from deadly ammonia. I say this because the last tank I set up I added fish without cycling first, and I never had any measurable amount of ammonia.
By the way, I recommend you try Excel. I began using it 2 weeks ago and I've already had a huge reduction in algae and improved plant health.
By the way, I recommend you try Excel. I began using it 2 weeks ago and I've already had a huge reduction in algae and improved plant health.