Koi Fish Information Centre

http://www.fishyfarmacy.com/
It’s National Fish Pharmaceuticals which is why you weren’t getting a hit to it right away. You can probably find Acriflavin in a smaller package elsewhere.
Their smallest size, 19.2 grams, appears to cost $34.+ http://www.fishyfarmacy.com/products.html
DOSAGE: 19.2 grams makes 1 pint. Five drops of this stock solution per gallon of aquarium water will treat approximately 1,000 gallons of water. Dosage: 1-5 drops per gallon. (5 drops per gallon = 5ppm.)
You’ll still have nearly a full pint of solution after treating your tank with the 100 drops (5 drops x 20 gallons).
Several other OTC meds do have acriflavin as one or more of their ingredients.. Kordon’s Acriflavin has trypaflavine 3.84%. Many other meds have acriflavin as one of their ingredients such as API’s Fungus Cure Powder Pack - 3 mg victoria green (aka Malachite Green HCl), 30 mg acriflavine per packet.
DrsFosterSmith.com - search for Acriflavin - http://pet-supplies.drsfostersmith.com/search?p=Q&lbc=drsfostersmith&w=acrif lavin&af=cat1:fish%20type:product&isort=score&method=and&ts=results&rt=templ ate_switch_search
API’s Fungus Cure Powder starting at $5.79 http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=16820 which treats up to 50G tank with two treatments. http://www.drsfostersmith.com/product/add_info.cfm?pCatId=16820
Lenny Vasbinder Fish Blog - http://GoldLenny.blogspot.com (Links to any articles referenced in above reply are listed on the right side, alphabetically under Labels and also under Archives by Year, Month)

Category: Philippines Internet Koi Society