Fish Dying? - The Planted Tank Forum
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post #1 of 5 (permalink) Old 03-05-2013, 01:13 AM Thread Starter
Algae Grower
Join Date: Feb 2013
Location: Maryland
Posts: 25
Fish Dying?

I started up a 10gallon planted tank about three weeks ago and put 5 ottos in there a week ago( I was planning on putting 3 of them in my 29 gallon later on) and I am down to 1 now... I also put in 12 galaxy galaxy rasboras yesterday and already 3 are dead! At the same time I put in the rasboras I put 10 Sunkist shrimp and they are all doing fine, eating, grazing, swimming... My water temp is 75*F and the pH was at 7.4, 0 nitrates and 0 ammonia.if you guys have any idea of what's going on please let me know :/ also the ottos (Otto now) were just laying on the ground and barely "sticking" to anything.
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post #2 of 5 (permalink) Old 03-05-2013, 02:29 AM
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Test your nitrites. 0 nitrates and 0 ammonia sounds like the bacteria are doing their job but your cycle isn't complete yet in the tank. Also, you might be a little over stocked for a 10G especially considering how active the Danio/Rasbora species are and causing them excessive stress. I would keep it to about 7 fish and do a 50% water change to get any harmful chemical levels down. Make sure to use prime or any sort of dechlorinator/slime coat
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post #3 of 5 (permalink) Old 03-05-2013, 02:34 AM
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Location: Portland, OR
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Otos need an established aquarium at least a month after cycling (so your tank would be running a minimum of 2 months total) and that is probably pushing it. Did you have algae for them to graze on? Also, adding that much livestock at once will cause your tank to cycle (although 2 weeks isn't long enough, I would cycle for at least a month) again because the beneficial bacteria haven't established enough to keep up with the fish waste. I agree with hunterlook that you also need to test your nitrites and that you are overstocked with 12 g. rasboras, shrimp and otos. I would stick with 5 rasboras, shrimp and 2 to 3 otos.

“Alive without breath,
As cold as death;
Never thirsty, ever drinking,
All in mail never clinking.”
― J.R.R. Tolkien

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post #4 of 5 (permalink) Old 03-05-2013, 02:58 AM
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I bought 6 otos from pet smart the day they came in big mistake. Only 2 lived. They I bought 2 others from a lfs mom and pop shop these guys were big and healthy had been in the shop a long time. They are doing great.

Otos are a fish that has a die off period. It's really sad but just part of it. The ones that make it will live a few years and will be very hardy.

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post #5 of 5 (permalink) Old 03-05-2013, 01:34 PM Thread Starter
Algae Grower
Join Date: Feb 2013
Location: Maryland
Posts: 25
More of the rasboras died. I put about half of the weather in the 10 gallon whaen I first started it up, and its in a room of windows so there was A LOT of algae growth. The rasboras were going to be transferred to a 175 gallon I am startin this weekend, I was using more as a holding tank... The oly problem is that all 10 shrimp are alive and healthy so if there was a bacterial problem wouldn't the shrimp be effected too? Thank you guys for the help
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