hypo treatment hydrometer off how much?

[briansreeftank19660426]

how much of those people that have done hypo salinity treatment have you found that your hydrometer has been off? how many points? im just curiuos and was it off to the up or downside.. over or under estimate? how much does a refractometer cost?

 

[birdy]

my hydrometers were 0.005 off, I got my refractometer off ---- $80.00 with shipping.

 

[briansreeftank19660426]

ed ever hear of getting lucky?