Refractometer????

[Mashpotatoes74402]

I found a refractometer on amazon for $20. Says it's useful for all kinds of different water testing needs. Including saltwater aquariums. The one on dr fosters and smith is 40$????
Where should I get mine.

 

[Lloydxmas]

I got mine off Amazon for 18 and it works great.

 

[TheTodd]

They are on eBay too. That is where I got mine...$15 if I recall correctly.

 

[dmolavi]

Pretty much any of them will work just fine. Make sure you get a bottle of cal fluid for it so that you can dial it in, and you're good to go.