Backyard Aquaponics
A place to discuss aquaponics

http://www.aquariumproducts.com.au/cata ... 79&catID=2

F&F got one of ebay cheaper. Does anyone actually use them/are they useful?

Don't know about salinity but I use one for disolved sugers when brewing, same principle different scales, so much easier and less waste.

I would say that if your doing a lot of testing then it's worth the $49

I have one works perfect

But is it useful? I can always use plant health as an indicator.... but have you ever needed to know exactly what it is?

Yea i use mine occasionally if i see something wrong i check to see how much salt [because salt gradually depletes in the system] and then add to bring it to 3 or4 ppm

so are you always running 3 or 4 parts salt in your system F&F?

Only if i see flashing etc or adding new fish [at the moment its on 2]

For those interested, Amacafish's wrap up of how salt kills bad things is a good'n:
http://www.backyardaquaponics.com/forum ... 382#110382

So I guess this salinity refractometer would allow you to tell what you should be dosing it up to in times of problems.

You got it