All the hydroponic stores online are selling TDS meters for $100+, So I figured that fish stores might sell them as well.
http://www.ozelink.com/tds_meters/purchase.htm
$19.95..
http://www.virtualvillage.com/Items/001480-018?&caSKU=001480-018&caTitle=3-in-1%20EC%20CF%20TDS%20Meter%20Tester%20Aquarium%20Pool%20Spa%20%20Water
$34.95
Will these meters work just as well as the higher priced ones? Are we getting ripped off because we are buying from hydro stores? I'm checking out my local fish place on the way home. What should I look for in a tds/ec meter from a fish store?
technologygarden
hooked_on_ponics
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