Chloroquine phosphate dosage

[Aquattro]

Hi, I have a hospital tank full of fish with velvet, and the over the counter meds (uni marin) are not helping. I've read several references to chloroquine phosphate/diphosphate at 5-10mg/l.
I have access to 250mg tabs of phosphate. Should it be 5 -10mg of tab, or active ingredient? The actual content of chloroquine is 155mg per tab.

Anyone use this in this form? Thanks

 

[slow_leak]

How mature is your filter on hospital full of fish. I am concerned that is doing more harm than good.

 

[Aquattro]

How mature is your filter on hospital full of fish. I am concerned that is doing more harm than good.

I'm using a large aquaclear HoB with a 2 week old foam cartridge and a newly acquired fully mature cartridge. NH3 isn't helping, it was off the scale this morning (pre cartridge), although I did a 80% water change and since added more filtration. I'm trying to track down a NH3 test kit to make sure it's 0, but it's late at night here.
I do have to treat the velvet though, and need to figure out how to use the tabs, the salts are not readily available to me.

 

[Aquattro]

I guess I'll use the tabs at 250mg, ground up for 5mg/l. Assuming anything is alive by the time I get meds

 

[alprazo]

I typically dose at 40 mg/ gal.