View Full Version : Need Advice Bad. Shrimps Dying.

09-07-2012, 04:15 AM
I just upgraded my 4 gallon cube tank to a 16 gallon bow front with 2 fluval c3 hob that was from my another 16 gallon bow front which I upgraded to a canister. Now my shrimp are dying.

Little info.

Got the tank setup last Friday with a big drift wood as a center piece with bunch of live plants to go with it, pool filter sand, seachem root tabs, 100 watt heater (not plugged in do to hot weather) aqueon modular led light. Use Prime to condition the water.

Added the shrimp on Saturday and spent 2 hours with a flashlight and shrimp net trying to catch the babies. Finally got them all. Plus my 2 Dwarf crayfish and my handicap baby swordtail. Added 2 cory julie catfish and 4 amano shrimps for cleanup duty. Everything was fine until I touch the tank on Monday.

My hob impeller got really noisy. Took each one apart to clean the impeller and add silicone grease (no petroleum additives) to the impeller shaft to keep them quiet. Added 2 gallons of treat water into the tank that I lost. Took some out to keep the sponge and bio media in when cleaning the hob.

After this, my cherry shrimp starting dieing. Lost 8 in a role and half the next day. Did a massive water change but losing 1 or 2 a day still. Crayfish, amano shrimp and corys are doing fine.

Here is my water parameters, API Master test kit that I use

Water temp is around 80 to 82 (been hot lately)
PH 7.6
High PH 8.2
Ammonia 0 ppm
Nitrite 0 ppm
Nitrate 0 ppm

Any ideas to what happen to cause half of the cherry shrimp to die?

09-07-2012, 05:57 AM
How did you cycle your tank?

Lady Hobbs
09-07-2012, 10:47 AM
I have never heard of silicone grease added to an impeller. I have never heard of vasoline added to an impeller, either, tho. Generally if that is used at all, it's only on the seal of a filter to prevent the seal from sticking or drying out.

I would have checked that impeller to make sure there was no obstructions around it, made sure it was seeded down properly and made sure the filter was sucking up no air. Not sure what happened to the shrimp but I would consider that silicone grease as a possibility.

09-07-2012, 12:57 PM
I use my old media to cycle the tank.

That what I suspected that killed the shrimp when I use silicone grease to quiet the impeller. That was the recommend method on the web to quiet a noisy impeller vasoline or silicone grease.

09-07-2012, 09:39 PM
There are no nitrates showing going by your results. To me that tells me the tank isnt cycled properly. Add that to the grease on the impeller.............


09-07-2012, 11:01 PM
So whats the proper level for nitrates? I'm confused on this.

Cory Catfish
09-07-2012, 11:18 PM
There should usually be about 20 as result of nitrite converting.

Could there also have been other chemicals like copper that somehow got into the tank?

09-08-2012, 12:57 PM
The only chemical I use is prime. Either the grease killed the shrimp or the water I added got contaminated some how.

My shrimp stopped dying finally. Hopefully I got enough left to restart the colony.

Any good links to read up on water parameters?

Lady Hobbs
09-08-2012, 01:21 PM
There should usually be about 20 as result of nitrite converting.

Could there also have been other chemicals like copper that somehow got into the tank?

There should not "usually" be 20 nitrates. Nitrates 20 or less is what is safest for fish tanks.

Nitrates are the end result of cycling but they are also the end result of dirty water, gravel that needs to be vacuumed and crud in the filter. My nitrates run very, very low. Sometimes undeteable because I clean my gravel, do large water changes and keep the media rinsed off. O nitrates simply means a tank that is kept clean.

Start getting sloppy with the filter maintence, stop cleaning gravel as you should and don't keep up with water changes and you'll start seeing nitrates spiking.

09-09-2012, 05:17 AM
Thanks Laddy Hobbs for clearing that about nitrates.

09-09-2012, 05:24 AM
Yeah, but the "got the tank setup Saturday" to me does not make for a cycled tank. Even with an established filter moved on it, it just aint happening.

And rarely and i do mean rarely do you see a healthy tank with 0 nitrates, most people do not sit on their tanks daily to remove every bit of poop and ammonia causing thing

But yep, whatever, just trying to help

09-09-2012, 06:10 AM
I appreciate your advice Alasse. If I offended you, sorry about that. All this stuff is still knew to me and I'm still learning.

10-04-2012, 11:14 PM
Three major mistakes.

1. Incorrectly cycled new tank.
Just because you plug in an old filter with beneficial bacteria doesn't mean your tank is cycled. Most of those bacteria die when you transfer to a new tank, as the new water lacks the nutrients they need to metabolize and reproduce.

2. You added chemicals to the water.
This one is kinda eh... non-toxic silicone or not, it came into contact with your system water. Perhaps you should have waited or rinsed before introducing that into your tank. Shrimp are extremely sensitive to trace elements in the water, almost like fry.

3. Frequent water changes.
Sure it's not really that bad, but when you're cycling new tanks you kinda need ammonia and nitrites to encourage bacteria growth. Changing too much water just gets rid of it.

A couple other things...

80-82 degrees?! To a shrimp, that's almost heatstroke.

8.2 PH?! That's SALTWATER PH, your FRESHWATER/BRACKISH shrimp can not be very happy.