Can water change kill shrimps?

[Jungle-mania]

I have been plagued with countless shrimp deaths for one reason or another. Now a new one I suspect is water change. I change 1/3 of my water in my 2 feet tank, I have added couple of anti-chlorine solution, half a cap of Seachem Prime, 1 cap of seachem excel, half a cap of nutrafin lushgro into the water. Today, I totalled a number of 6 dead shrimps. Any advice?

[silane]

You have added too much thing in 1 time and have changed too much water at 1 shot.

If there is no better reason, change about 15% of water each time, change more frequent then change larger volume for shrimps.

Premix anti-cholrine into water before adding them into your tank. Best to use aged water.

[Jungle-mania]

Noted, will keep that in mind.

[Merviso]

hi bro, like what bro silane has mentioned, I will usually not change too much things in one day for my shrimps tank. That means when I change water, I will usually not add fert and excel; it will at least be one day later.

[waterfaller1]

Too much Prime and too much excel IMO. Get a 1 ML syringe for your Excel, and start accurately dosing it in ML. I change 50% of my water each week without issue, sometimes more. How many gallons is this tank? I am not familiar with nutrafin lushgro, do you know what's in it?
As stated, the day you do a wc should be the day you 'reset' the nutrients..no dosing necessary.

[Quixotic]

I change 1/3 of my water in my 2 feet tank, I have added couple of anti-chlorine solution, half a cap of Seachem Prime, 1 cap of seachem excel, half a cap of nutrafin lushgro into the water.

I think you have been far too liberal with Seachem Excel and overdosed. I would use with caution even for the recommended dosage based on the directions.
http://www.seachem.com/products/prod...rishExcel.html

DIRECTIONS: On initial use or after a major (> 40%) water change, use 1 capful (5 mL) for every 40 L (10 gallons*). Thereafter use 1 capful for every 200 L (50 gallons*) daily or every other day. Dosing may be slowly increased in high-growth aquariums. For smaller dosing please note that each cap thread is approximately 1 mL.

Just a note that Excel itself may not actually be lethal to fauna directly, but in aquaria, it has impact on the eco-system and will effect water conditions. (Believed to bind oxygen, therefore causing depleted dissolved oxygen which is an issue with fauna, especially so with dwarf shrimps.)

[jetset]

Think its the dosage of the chemicals you put in. I do 50% wc weekly, sometimes twice a week and no issues. No chemicals except for anti-chloramine. I'm thinking of getting a water-purifier so that I can even exclude that. I don't believe in chemicals unless you have a very big tank or are able to control dosage with most minute accuracy.

A disclaimer though... I only do this on my fish+shrimp comm tanks and my cherry and malayan tanks. CRS tanks, normally 10-20% wc one to three times weekly. My concern here is that the temp of the new water will be too different and don't want to shock the shrimps.

[Jungle-mania]

Hmm, I think I will be more conservative on my water change first. Also does pH shock have anything to do with it?