Fishtank Crisis! Ich And Fin Rot!

Hi,

I know this is a long post, but I really need help. So please bear with me.

I have a 20 gallon tank that's been running for 3 months now.

I think 5 days ago I got 3 lyretail swords and 2 black mollies to join my 3 regular swordtails, 3 mollies, 3 corys, and otocinclus.

Every fish seems happy, they are all very active and eat well. They nibble my finger every time I put my hand in the tank.

But for 3 days now, I've been seeing some worrying things in my tank.

First off, one of my old swordtails has a white streak on its tail that's getting worse. It's starting to get frayed. I think it might be fin rot.

Second, my new swords have a pretty bad case of ich.

Third, some of my other fish sometimes behave strange. They seem to scratch on surfaces, and on very rare instances, make sudden jerky movements.

I once noticed my older sailfin molly have a kind of weird 1 second seizure, as if it was electrocuted! It flared it fins, opened its mouth, and vibrated! And it too seems to rub against surfaces.

All fish are very active and eat well. Those that scratch against surfaces don't do it often.

But I'm worried for all my fish. I've been using pimafix and melafix together for two days now, but I'm not sure if that's enough, or if it's the right thing to do.

I have always had salt in my aquarium, and the normal temperature is 80 degrees. But I increased the temperature over two days to about 84 degrees in hopes of fighting off the ich.

Can someone please please help me get through these issues??

Thank you so much.

I've posted about the fin rot and ich seperately before. You'll find more details about them in these threads:

Old swordtail with possible fin rot - http/www.fishforums.net/index.php?/topic/433568-white-streak-on-tail-of-swordtail/

New swordtail with ich - http/www.fishforums.net/index.php?/topic/433568-white-streak-on-tail-of-swordtail/

Can you please post water stats in ammonia, nitrite, nitrate, and ph.
 
I would add a whitespot medication to the tank.As it sounds like the fish are suffering.
 
Remove the pimafix, and melafix with a water change.
Also the whitespot medicaiton will help with the finrot. Also whitespot can cause finrot.

Ditto Wilder, do a wc and use a combination of either protozin and myaxazin (you would need to double check these) but I know for sure you can use esha exit and esha 2000 at the same time to tackle the whitespot and fin rot.

star4 his location is Canada so I doubt he will be able to get hold of those medications.

Thanks for the replies, but you're right Wilder, I don't have access to those medications.
 
I know I'm asking for a lot of your time, but do you think you can recommend something for me from one of these websites?
PetSmart - http/www.petsmart.ca/fish/disease-treatment/cat-36-catid-300009
Big Al's - http/www.bigalspets.ca/fish/health-supplements-medications.html
I pretty much have access to only the stuff on these websites.
 
And I'll try to post my water stats by the end of the day tonight.
And white spot medication will really help me with this?:
 

As well as the water change id recommend adding carbon to the filter for 24hrs to consume any excess medication before dosing anything else that could cause more issues/stress than its worth!
Just remember to remove the carbon before adding more meds.

In addition to treating the sick fish you need to look at your stocking. 6 swordtails and 5 Mollies are too much for a 20 gallon. Are you planning to upgrade soon?
 
Have you had the new additions in a QT before hand? Quarantining new fish for 6 weeks lets you make sure they're not bringing any diseases into your main tank.
 
A spike in ammonia is to be expected if you add 5 more fish to your tank, you would need to regularly check your ammonia and nitrite levels so you can make water changes accordingly. Your fish rubbing themselves on the substrate and the tank decor (flashing) means something is irritating their skin. This could be from higher ammonia levels or the ich parasites.
 
For treatment you could have a look at the heat and salt method. I have used this treatment with otocinclus and cories myself without any problems. The salt may also help treat the fungus/bacterial infection on your fish's fin.