Join Date: Jan 2013
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Mini Cycle? and Problems with Neons
So my tank finally finished cycling. 20 gallon marineland halfmoon. Not knowing any better I cycled with 5 neon tetras. One died within days of being added before any toxins built up in the tank (LFS checked the water and refunded the fish) and one died about two weeks in, likely from ammonia spike. But 3 made it through the cycle. I did a 25% water change the weekend before the cycle completed to lower nitrites and try and save the remaining fish. After the cycle was complete I added 3 more neon tetras (6 total) and 2 fancy male guppies, and an assassin snail. This was last Saturday. Again one of the tetras died in less than 3 days and another one this morning, both had been kind of hiding before their demise. After losing two fish I tested the water an Ammonia = 0.5ppm, Nitrites = 0, Nitrates = 5 ppm. Didn't check the pH but it has consistently been ~pH=7.6.
1) With some ammonia being present after previously reading 0 is my tank going into a mini cycle, if so why?
2) Am I doing something wrong or are neons really that weak and susceptible to neon tetra disease
Thanks for the feedback.
20 Gallon half moon Marineland Aquarium
1x German Blue Ram - Rambo
1x Dwarf Flame Gourami - Oragami
1x Bristlenose Plecostamus - Pleccito
5-6x neon tetras
3x Male Guppys - Tequila, Sunrise, Moon
3x Julli Cordoras - Julli, Cory, Cat
1x Assasin Snail - Bruce