Trouble with Ninja Shrimp

[CCA001]

Thanks in advance for any advice i am given :)

Here is a pic of my planted tank with Ninja shrimp in up untill about 4-5 weeks ago i had about 150-200 ninja shrimp in here it was crawling with them and the KIDS LOVED IT now i have about 20-30 left and cant spot any berried females :(

I had a thought the other day i hooked the CO2 unit back up (bottle filled again) after about 5mths of no CO2, would thi have caused them to start dropping off i only have about 1 bubble every 1-1 1/2 seconds.

[Robert]

it could be one of two reasons:

a) co2 drops your ph and if you have it on a timer your ph might fluctuate because you have something like a rock that may buffer the ph back up.

b) the co2 causes a decrease in oxygen in your water, if you dont have a air stone you may be suffocating your shrimp. if you have your co2 on a timer then at night time your plants absorb oxygen teamed up with the already lack of oxygen during the period when the co2 is on it could result in fatalities.

thats all i can think of at the moment.

[CCA001]

Yes C02 is on a timer to be on when the lights are on.

I also have the NEW ADA Amazonia as the soil so that may buffer it back up over night but i have checked PH at certain times to find it hasnt dropped to much.

Going to try and catch all the shrimp out and put into the new setup in a few days as im running really low on them now :(

Anyone in perth have some for sale (please PM ) that i could grab as i feel bad for my daughter who keeps asking were all her shrimp have gone :(

[Robert]

for the time being i can only recommend you put an airstone in and if you want to be extra cautious turn off your co2 completely.

[bigjohnnofish]

i have plenty of ninjas - cheap for you too!!! just a drive up to the hills :) plenty of females pre loaded with eggs as well.... maybe interest you in some reds/yellows too while your here!!! :)