tomasm87
Aquarium Advice Activist
Are harlequin's know to die shortly after being introduced to an aquarium? My ammonia and nitrites are 0 and my nitrates are 10-20ppm(they look the same to me). Added 8 last friday afew days later a few died and now i have 5. Just wondering if its common because i have Neon tetras in my aquarium as well and when i started adding them a few died also.