Guppy Problems Any Ideas Welcome

[Mandi7891]

Ok so this may be a bit of a "can of worms" type post.
Firstly water levels
Ph: 6.0
Ammonia: 0.25ppm
Nitrite: 0ppm
Nitrate: 0ppm
Tank size 30ltr

Last Thursday I tester water and the ph was somewhere between 7.4 and 7.8. All the rest were the same. Thursday evening I noticed white flakes on some of the fish, friday morning I lost 4. I then went to fish shop and was given a finrot, fungus and bacteria medication which I added it was a 3 day course but on Sunday I noticed still some had white flakes so was advised to do another day which I did. Monday I lost a further 2 fish. Yesterday I was told to turn temp to 30*c, last night I noticed some were swimming on their side or backs and this morning I woke up to 3 dead. They all looked healthy until about an hour before they died.
My questions are: could ph kill the fish this quick
Could ph speed up an illness they have
What illness could they be suffering or is it just the oh that's killing them off.
What could of cause ph to change so quickly
Is there anything I can do to save my remaining fish?

I have 4 left and one of them is swimming strangely, I have tried deshelled peas last night.

Any help would be great, I have another tank running which is really healthy to the point I had some platy fry born on Friday which are thriving.
Should also say before last Thursday all guppies looked great and all females were pregnant and healthy.

 

[the_lock_man]

A pH swing that quick could kill the fish, yes, but it's these flakes that I'm concerned about.
 
Could you take a photo of it at all?

 

[WILDER]

How many fish do you have in the 30 litre tank please?
What the name of the test kit you are using?
It's rare to have a nitrate reading of 0. What is your tap nitrate reading. Do you have live plants in the tank.
When did you last add a new fish to the tank?
 
For now water change to dilute the medication down.
Increase aeration.
 
Not all fish tolerate the interpet anti fungus and finrot med. It's not that good in my opinion.As it can have a bad effect on
certain fish.
When you say white flakes do you mean tiny white spot, Of flakes that look like cotton wool.

 

 

H Shock
 
As its name suggests this condition occurs when a fish is introduced to quickly into a new environment which has a very different pH from the one it came from, when the pH is adjusted to quickly and the fish have little or no time to adjust themselves, or when the pH is to far outside the fishes normal range.
 
It is very important that any change in water chemistry is made slowly and fish should never be exposed to changes of pH greater than 0.5 of one unit on the pH scale in either direction.
 
Avoidance is by far the best solution because in most cases the symptoms don't appear until the second or third day by which time the damage has been done and the fish will probably die.
 
A fish suffering from this condition will show all the typical signs of shock -
 
Lying on the bottom and paying little or no attention to its surroundings and ignoring potential threats. 
It may even lay on its side or go upside down completely. 
There could be other signs to, related to Acidosis and Alkalosis 
Excessive mucus production. 
Rapid breathing. 
Swollen abdomen. (Alkalosis only).
If the condition is allowed to go on for one or two days then the chances of a successful remedy are greatly reduced because a lot of damage will have taken place. If the symptoms are spotted early enough there are a couple of things that will help.
 
Begin to return the pH to the original pH in steps of 0.4 of one unit on the pH scale and allow 3 hrs in between the adjustments. Make these adjustments until the pH is returned to a safe and satisfactory level. 
Treat the tank with a broad spectrum anti-Bacteria/Fungus compound to prevent secondary infections of the Skin and Gills.
Prevention is easy. A successful treatment isn't!
PH SHOCK LINK

 

[WILDER]

This is what whitespot looks like. But the spots look a lot larger in the picture.

 

[WILDER]

Sorry for all the questions they can be a bit over whelming but we need to ask to help you.

 

[Mandi7891]

Ok so tap nitrate is 5ppm.
Did have 13 guppies but now only 4 remain,
Haven't added any new fish for about a month when they were all added, full tank had previously been cycled. I can't seem to add a picture for some reason but it looked like the ends of their fins had been dipped in paint which was peeling off. Did a 40% water change yesterday! I've not done anything for the ph to change that quickly only thing I can think of is the med has changed it as I use same tap water in other tank and it's 7.4, I've just noticed their gills look extremely swollen and red.
This is not going well.
Hopefully this will post, this is one that has since died
Of and it's an API freshwater master test kit

 

[WILDER]

In a 30 litre tank you should only be keeping 5 guppies. To be honest they really need a larger tank as there active fish and need
At least a 12 gallon tank.
 
Is the medication you have been using is it by Interpet range?
 
Myxazin by waterlife is a far better medication on fins problems. As I said in my previous post the anti fungus & finrot medication can have a harmful affect on some fish. By my own experience the interpet medication  does not seem to do much either on finrotl

 

[WILDER]

Did the gills swell up before adding the medication, or after?

 

[Mandi7891]

They were red about a week before as I had an ammonia peek so used an ammonia remover. Then had a week of perfectly healthy fish before what I though was fin rot,

 

[WILDER]

OK. Your filter wouldn't of been coping with being overstocked.
Have all the 4 remaining fish have white edges to there tail fins?
 
Are you sure your nitrate reading is 0.

Just noticed the picture you have put on the site.You need to act fast as guppies can soon lose there tail fin fast.
Even when it goes down to half size they rarely make it.
 
 
 

Fin Rot

 

 

Symptoms:

Fish may have deteriorating fins, often with red or white edges. Secondary Fungal infections often occur.
 


 

Cause: 

Bacterial infection caused by Aeromonas and/or Pseudomonas bacteria often precipitated by poor water quality, low water temperatures, or a combination of both.
 


 

Treatment: 

You will first want to determine the specific cause of the illness, so check your water�s quality Ammonia, Nitrite, pH, and Nitrate levels as well as the temperature. Be sure to provide optimal water conditions and the correct water temperature for the species of fish you are keeping. Treat with Kanacyn, Tetracycline, Furacyn, Nitrofura-G or Penicillin. Basically, you want an antibiotic specific for Aeromonas and Pseudomonas bacteria. The use of a medicated food is also wise. Treat the fish in isolation (i.e., quarantine tank) if only one fish is sick. If not, the whole tank should be treated. In either case, water conditions must be improved and proper temperature maintained for all fish. Adding salt to the water may be helpful.

The success rate for treating Fin Rot is good providing the illness is caught early and water conditions are kept optimal. Left untreated this infection can be deadly. Early treatment is essential! Once treated, fin tissue lost to this illness will grow back providing the fin rays and/or fin bases have not been damaged.

 


 

 

[WILDER]

How long have you been using the medication?
I would preform a water change and add one tablespoon of salt to the tank.

 

[Mandi7891]

I used medication for 4 days in total, and no none of the remaining fish have the white, but neither did the last 3 that died I have 4 guppies now and keeping it at that until I no what's happening

 

[WILDER]

Remove the medication with a water change, then run some new black carbon.
I would try and buy myxazin by waterlife.