Hi California:
Here are effective treatments based on breaking down viral particles:
200ppm NaOCl (bleach) for 1 hour
200ppm iodophors for 20min
60 ppm benzalkonium chloride, 20 min
https://books.google.com/books?id=Zw...201996&f=false
Standard household bleach is 5.25% (w/v). That means every 100mL of the solution has 5.25 grams of bleach in it. This is also the same as saying every 100mL has 5250mg of bleach. I'm stressing this because an easy way to figure ppm is to convert it to milligrams per liter (mg/L).
Let's say you want to get to 200ppm in a 10L system. You multiply the size of the system (in liters) times the desired ppm.
10L * (200mg/L) = 2000mg.
Okay, you need to get 2000mg of pure bleach (NaOCl) in there, and you have a solution that has 5250mg in every 100mL. To figure out how much of that solution you need to add:
2000mg * (100mL / 5250 mg) = 38mL
If you look at a tablespoon, you'll see that it is ~15mL. So you need a little more than 2.5 tablespoons of bleach for every 10L in your q-tank, running for at least 1 hour.
You can see where a few cheap plastic graduated cylinders (for example: https://www.amazon.com/Plastic-Gradu.../dp/B076VKP4CP) and a scale that measures accurately in milligrams can make this a lot more precise. You can also see where you can get away from a lot of complicated nonsense calculations if you just learn two things:
#1 the volume of your pond in liters
#2 ppm is equal to milligrams per liter
After you've finished with the bleach, I would run some hydrogen peroxide through the system to break the bleach down. You don't need to work too hard to calculate this, just drain the bleach, add clean water and dump about the same amount of drugstore peroxide (typically 3% w/v) in. Let it run for a few hours, then dump it out and let everything air dry. There's largely no residue from the peroxide to worry about.
I'm sorry about the fish.
You probably need more air in the pond. I would look to at least a 25LPM air pump, which Laguna (that's your local shop, right?) should have. If not, Billy has a bunch. http://www.cascade-pond-supply.com/K...tion-c-25.html Most come with a cheap manifold, which you can branch off to your q-tank when you need to, but you'll need to make sure the hoses are isolated in the event of pump failure (i.e. make sure the air pump is above the level of water in both systems). Get separate air stones for the q-tank.
-t