meter

Does anyone in the Metro Detroit area know if any places within 30 minutes of Roseville rent PAR meters? Trying to avoid buying one since I just have to test my 20g NANO.

Hey all! I have for sale two pressure gauges and a TDS monitor for your RODI filter as follows: HM Digital TRM-1 Triple Inline TDS Meter brand new in package - $25 Sold! The Water Filter Men air filled pressure gauge, brand new in package - $15 Malida gel filled pressure gauge, new open box...

$95... only used once to get my initial par readings worked great.

Okay so Hanna's Digital Salinity Meter requires calibration right? Could Hanna produce a Checker that did not require the purchase of calibration solutions? For example if a Salt Mix Pack says "Mix 1g of salt to 1 liter of water for 35ppt" Bearing in mind Hanna Calibration solution is 35ppt, you...

So I have a cheap (relative to other lights in this hobby) fluval reef 2.0 led and I've had a hard time keeping anything but softies and feel like I want to see about making a change to the lighting schedule or just swapping to a pair of used generic black boxes I got cheap. I really want to see...