meter

Hey guys! I have used but fully functional Appogee MQ-200 PAR meter I no longer needed. Included the meter with attached sensor. Asking $225 shipped to the lower 48 and includes all PayPal fees. Please let me know if you have any questions! I’m this photo, there’s not enough room light for the...

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...