Whitespot doesn't have anything to do with tails. Also, raising temperature without adding medication would only make the whitespot a lot worse, because the higher temperature will speed up the rate at which it multiplies. Please post more details (and a photo): http

/www.fishforums.net/index.php?/topic/2330-please-read-before-posting-to-emergency-section/
It sounds like finrot, search for some images to compare.
At any rate, a few large, temperature matched water changes will do more good than harm.
it definately has white spot as, well, it has alot of white spots, it may have white spot in conjunction with fin rot though, how do you treat fin rot, as i have never had to deal with this disease

thnks
1. Water parameters. (ammonia, nitrate, nitrite, PH, temp', Hardness etc)---
Ammonia(No test so not sure) Nitrate-10 nitrite-0 ph-7.5 hardness-8od
2. A full description of the fishes symptoms.--- small white spots on all of its tails and head. rotting tails
3. How often you do water changes and how much.---35% weekly
4. Any chemicals and treatments you add to the water.---dechlorinator, sera toxivec, liquid plant fertiliser
5. What tank mates are in the tank.--- few snails,5 neons
6. Tank size.---50ltrs
7. Finally Have you recently added any new fish?---no
You may cut and paste the template below and submit in your post:
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Tank size

--above
pH

--above
ammonia

--above
nitrite

--above
nitrate

--above
kH

--6od
gH

--above
tank temp

--26oc
Fish Symptoms (include full description including lesion, color, location, fish behavior)

--symptoms above, fish seems distressed and very unhappy
Volume and Frequency of water changes

--above
Chemical Additives or Media in your tank: ---bio balls in filter and active carbon
Tank inhabitants

--above
Recent additions to your tank (living or decoration)

--none
Exposure to chemicals

--dechlorinater, sera toxivec. liquid fertiliser.
Digital photo (include if possible)

--sorry, not possible