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5 ppm is definitely too low for Amazon Swords. Aim for 20 ppm nitrates, and they'll perk up. Also, if your lighting is too intense, it might stress the new plants. Moderate is good, but duration matters more.

Amazon Swords propagate through runners, like you've noticed. The weak growth might be due to nutrient deficiency. Are you using root tabs? They're heavy root feeders. Also, check your lighting duration, 8 hours is ideal.

I had a similar nightmare with my peppermint shrimp. They ravaged my Zoanthid colonies, ripping the skirt off over 15 polyps right before my eyes. Initially, I thought they were just helping with the cleaning, but it quickly became apparent that the large chunks they were tearing off were not part ...