How many Ottos for a 16 gallon long shrimp tank?

TacomaToker
Member
I've got a 16 gallon long tank with about 25 cherry shrimps. There's a lot of space, moss, and decorations so 25 shrimps take up less space than I thought. How many ottos can I add to spice things up? I am thinking 4-5. Thanks for any advice
 
FinalFins
Member
TacomaToker said:
I've got a 16 gallon long tank with about 25 cherry shrimps. There's a lot of space, moss, and decorations so 25 shrimps take up less space than I thought. How many ottos can I add to spice things up? I am thinking 4-5. Thanks for any advice
Heyo,

Personally I would add none. Otocinclus and neocaridina go after the same food source, algae/biofilm/infusoria and theoretically one or the other would outcompete each other.

If you are set on them get a pair of them. They are really social fish so you should ideally purchase at least 2, but more than that may wipe the tanks food source clean.
 
FishBoy101
Member
FinalFins said:
Heyo,

Personally I would add none. Otocinclus and neocaridina go after the same food source, algae/biofilm/infusoria and theoretically one or the other would outcompete each other.

If you are set on them get a pair of them. They are really social fish so you should ideally purchase at least 2, but more than that may wipe the tanks food source clean.
I agree, they will clean algae till there is no more and then starve.
 
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TacomaToker
Member
FinalFins said:
Heyo,

Personally I would add none. Otocinclus and neocaridina go after the same food source, algae/biofilm/infusoria and theoretically one or the other would outcompete each other.

If you are set on them get a pair of them. They are really social fish so you should ideally purchase at least 2, but more than that may wipe the tanks food source clean.
I've heard of lots of people keeping neos and ottos succesfully. tons of forums posts of people who say they live peacefully together. theres a lot of green algae in the tank and I've got plenty of algae tabs on hand. you really think there would be food shortages? the tank is right next to a window.. lots of algae.

Thanks for your help
 
FishBoy101
Member
gl, if I had to add any I would just add 2-3.
 
  • Thread Starter
TacomaToker
Member
FishBoy101 said:
gl, if I had to add any I would just add 2-3.
Thanks, 3 sounds good. Do they not need 4-5 as a group?
 
FishBoy101
Member
They would destroy the algae and starve.
 
FinalFins
Member
TacomaToker said:
I've heard of lots of people keeping neos and ottos succesfully. tons of forums posts of people who say they live peacefully together. theres a lot of green algae in the tank and I've got plenty of algae tabs on hand. you really think there would be food shortages? the tank is right next to a window.. lots of algae.

Thanks for your help
As the colony of neo's grow, there will be more and more competition between the two groups, and the neo's have the upper hand on food.
TacomaToker said:
Thanks, 3 sounds good. Do they not need 4-5 as a group?
They do, but adding 4-5 ultimately means death by starvation.
 
  • Thread Starter
TacomaToker
Member
I’ve got a 16 gallon tank with about 25 cherry shrimp. There are 3 ottos doing great in there, but I don’t get the schooling behavior much. I’d like to add 3 more, I’m wondering if people here think that’s appropriate. The tank is next to a window, receives 14 hours of light per day, and is dosed with ferts so there plenty of algae to go around. Any advice is appreciated, thanks!

Edit: I forgot to mention that I feed the ottos zucchini
 
Noroomforshoe
Member
If you are sure there is plenty of algae, if your tank is fully cycled, if you are going to be on top of the maintence , then 3 more ottos can work. They like to have a group of friends around. 6 is a good minimum for a shoal of ottos. But they are not really going to do any schooling.
 
  • Thread Starter
TacomaToker
Member
Noroomforshoe said:
If you are sure there is plenty of algae, if your tank is fully cycled, if you are going to be on top of the maintence , then 3 more ottos can work. They like to have a group of friends around. 6 is a good minimum for a shoal of ottos. But they are not really going to do any schooling.
I just meant some behavior like this:

 
86 ssinit
Member
Because of the size of the tank I think 3 is enough. Having them eat zucchini is a plus but I’d still stay at 3. I have 4 in a 90,125 and a 30. All are doing great.
 
jake37
Member
I have 11 of them in my 40B and while sometime they will group up when eating i never see them 'school'. Pygmy cory will school (but your tank is too small for 6 of them and they are smaller than ottos). Ottos are social but not really schooling fishes.
--
Looking at the video - 3 should occasionally do that but even having 11 they don't do that very often - occasionally i will get 9 together but usually they scatter out - the clumping occurs when they find something really good to eat in one spot (i do frequently get 3 to 5 feeding off the zuc together).
 
  • Thread Starter
TacomaToker
Member
jake37 said:
I have 11 of them in my 40B and while sometime they will group up when eating i never see them 'school'. Pygmy cory will school (but your tank is too small for 6 of them and they are smaller than ottos). Ottos are social but not really schooling fishes.
--
Looking at the video - 3 should occasionally do that but even having 11 they don't do that very often - occasionally i will get 9 together but usually they scatter out - the clumping occurs when they find something really good to eat in one spot (i do frequently get 3 to 5 feeding off the zuc together).
Yea, I have a school of 6 panda corys in my 45 gallon and they roam the tank together all the time. You're saying the ottos won't exhibit the same type of behavior?

When looking around online, it says the minimum number for ottos is 4-5. Should I just get 1 more?

86 ssinit said:
Because of the size of the tank I think 3 is enough. Having them eat zucchini is a plus but I’d still stay at 3. I have 4 in a 90,125 and a 30. All are doing great.
I think I am going to get 1 more, since 4 feels like the minimum number throughout my research online. You having 4 in each tank is further evidence to support that. Thanks!
 
AquaticQueen
Member
I would stick with the 3 otos you have. If you add more they would probably starve because there won't be enough algae. 3 seems like a little much already.
 
kallililly1973
Member
In a 16 gallon i wouldn't add anymore than 2-3 personally.
 
  • Thread Starter
TacomaToker
Member
AquaticQueen said:
I would stick with the 3 otos you have. If you add more they would probably starve because there won't be enough algae. 3 seems like a little much already.
Wrong. They won’t starve, since they eat zucchini all day every day. Please read the entire post. Thank you.
 
Noroomforshoe
Member
I believe that you are fine to get more. the ones that you have eat zuccini so even if the new one/ones do not adapt to it, they should have plenty of algae. Your main issue will be controlling the water conditions. you want to keep your nitrates in the safe zone, which is at the most 40 ppm, but better at 10-30 ppm.

FYI, that grouping behavior looks like my loaches when I drop a wafer or vegitable in the tank. or when you see ottos in the pet store and there are 20 in the tank. In the wild , were most otos are directly removed from, there could be a thousand of them in a group. so even suggesting that a minimum school should be 6 is kind of silly, for lack of a better word.
 

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