Need Remedy,fish Dying After Water Change?

[Prashanti]

I have fish tank 29 gallons [mollies,platy,Gourami] with 200w heater which on 24 hrs,1 month old tank..yesterday I did water change and cleaned the gravels and filter,today all my fishes dying ,I understood my mistake I cleaned beneficial bacteria or may be chlorine??,please suggest what remedies can take in this situation to prevent further loses

 

[Ch4rlie]

What are the water tests readings?
(Ammonia, Nitrite and nitrate)
 
Did you add dechlorinator when you did the water change?
 
Cleaning the gravel and the filter too much can risk you losing some of these beneficial bacterias that you need but it depends on how much you cleaned.
Did you swap out the filter media or clean them?

 

[Prashanti]

Ya I cleaned filter media by taking out the medium...no tests taken

 

[Ch4rlie]

Did you add dechlorinator when you did the water change?
 
You'll need a test kit if you have not got one, pretty much a must have for new fishkeepers and for incidents just like this. Btw, a liquid based kit is more reliable, try not to buy the paper dip strip kit type.

 

[Prashanti]

Hmm ya, can you suggest me which test kit brand is good for ph,ammonia??

 

[Ch4rlie]

Well, am unsure what is available where you are, if your profile is right, India.
 
Can you buy things online easily?
 
I would recommend, for value for money and reliability is API Master Test kit, this contains a decent number of tests for Ammonia, Nitrite, Nitrate and pH (low and high range).
 
 
This is a pic of the test kit I speak of.
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As for your situation, when did you change the water in your tank?
 
If the water change was done yesterday or earlier, then would suggest doing another water change to lower ammonia or nitrite, the lack of test reading makes this a bit of a guess. And would do water changes again when the fish shows signs of gasping/lethargy/staying at surface of tank water until your bacteria colony builds up again, hopefully you have not taken out too much of these bacteria.
 
An alternative that may help is to get some Dr Tim's One and Only Nitrfying Bacteria as this bottle contains both types of bacteria needed, thats if you can get it if course where you are.
 
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[Prashanti]

Thanks...my fishes are in active and stays in top..ill do 20 percent water change..let's see

 

[Ch4rlie]

I'd do more than 20%, try to change as much as you can.