New filterless jar shrimp aquarium.. lil help please.

Kanti113

Hey ive started new filterless 7.8ltr jar aquarium for shrimp. I used a mix of old substrate with some new added, roughly 50/50 cycled tank water from my aquarium and fresh added with quick start api. It's planted with java moss (new), some cuttings of Limnophila Sessiliflora, and tissues of Glossostigma elatinoides. I've also added a 10w betta heater present to 25*c which seem to work well. My pH is 7.2 with 0 ammonia, nitrite and nitrate. I added some co2 booter and leaf booster earlief in the week. The problem is I added some shrimp and the didn't last more than an hr. They were fine after acclimatising using the water which by the end the had 2x the amount with them over their original and sat for around 40 mins to be sure. Question im asking I, I know shrimp can be very tender and im not were what may have caused the die off.
 

ruud

Your intentions could work.
  • I wonder about the shape of the jar, though; the more surface area the better of course.
  • I really feel most people add to much fresh, conditioned water; if you have water from an established tank; just use that.
  • The filterless approach works if you add a lot of plants; I am not sure what the total biomass is in your jar. If in doubt, add more.
  • I would not use CO2 booster.
  • The biggest reason why your setup is not working right not, and your shrimp are not surviving, is -I think- the heater. I'm not sure what species of shrimp you have. I never use heaters in the first place, except for my Caridina tank, but no more than 23 degrees Celsius, in which case you have about a 1:1 male : female offspring ratio. Neocaridina's are generally kept lower.
    A 10w betta heater does not sound like a controlled heater, but like a heater that simply and blindly heats up; correct? Are you sure it is 25 degrees Celsius?
  • For shrimp in general holds: stability is more important than the specific parameters (except for extremes of course)
  • Also, shrimp, like most fishes, but definitely shrimp, are very sensitive to sudden temperature highs. Lows not so much, but if shrimps are placed from a ~20 degrees Celsius environment to a ~25 degrees Celcius environment....it might cause near instant death.
 

Kanti113

Thanks for your reply.. It's a preset 25*c betta nano heater. Would I be better to run without one at all? Was worried the shrimp would need a consistent temp. I have some established tanks so ill try use more of their water. The jars around 22.4cm wide at the opening by 31.5cm deep.
 

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ruud

Can't see it really clearly, but I think I would remove some substrate and definitely add more plants. One big java fern would do and look so well in your jar, for instance. And yes, I would absolutely remove the heater, especially if you have Neocaridina's like cherry shrimp. Tiny water changes, once a week or every other week, would suffice. Leaves as a food source, just like a large plant, is almost all they need. Because your water is still, a floating plant, like Ceratopteris thalictroides, would look great and helps filter your water. Some calcium/mineral supplements every now and then, and they should even breed in your unheated vase.

The image in my avatar even houses Caridina shrimp and they are breeding. The tank gets direct sunlight for 2 hours a day max. It does have a filter; the water height is at par with the tank, I do need to top the tank every week so the water stays at par; and once a month I do a small water change. In this tank I don't feed them. It houses 1 tiny Dario fish, so the population of shrimp won't grow in this tank. This shallow tank has a 17 liter volume. No heater, no artificial light.
 

Kanti113

Thanks for the help.. my jarquarium is doing great. After removing the heater, I added a java fern left it for a week and gained some biofilm, then added an old hangover filter i had, on a low setting. The 12 cherry's are happily feeding on the bio film I accumulated for the past wk.

Also added a.small clip on led book light for viewing.

The jar itself works well also since the glass being so thick keeps temperature stable and adds a magnification effect while viewing.
 

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