ITC Aquatics PARwise PAR Meter
The PARwise par Meter is ITC Reefcultures latest tool designed to resolve questions about optimal lighting settings for aquariums. It helps determine the correct brightness, color spectrum, and photoperiod for your aquatic environment.
Perfect growth rates require three key factors: appropriate wavelengths, correct light intensity, and the right duration of exposure. Light conditions vary with depth and water clarity, and these factors directly impact the needs of aquatic plants and animals.
The human eye is not reliable for assessing light levels or color accuracy. PARwise provides precise measurements to ensure accurate lighting decisions, enabling better outcomes for both aquatic and terrestrial organisms.
| Feature | Specification |
|---|---|
| Measurement Type | Photosynthetically Active Radiation (PAR) |
| Light Spectrum Range | 400–700 nm |
| Display | LED digital readout |
| Battery Type | AAA batteries (not included) |
| Usage | Submersible for aquariums and ponds |
FAQ
How does PARwise measure light intensity?
PARwise uses a sensor that detects photosynthetically active radiation in the 400–700 nm range and converts it into a digital reading that reflects light intensity in micromoles per square meter per second.
Can PARwise be used for both marine and freshwater setups?
Yes, PARwise is suitable for both marine and freshwater environments, as it measures light intensity regardless of water type, helping users optimize lighting for aquatic plants and animals.
Is the PARwise meter waterproof?
The PARwise meter is designed for submersion in aquariums and ponds and is rated for use in aquatic environments, but it should not be exposed to direct sunlight or high-temperature water for extended periods.

Isaac Lee –
I’ve been using the PARwise meter for a few weeks now and it’s made a big difference in my reef setup. I used to guess my light settings, but now I can see exactly how much light my corals are getting. The readings are clear and consistent, and it’s helped me adjust my photoperiod and intensity for better growth.
Peter Baker –
The meter is easy to use and gives accurate readings. I noticed my anemones are more vibrant since I started using it. It’s a small device but very effective for tracking light levels in my tank.
Carolyn Greene –
Before this, I struggled to understand how my lights were affecting my plants. Now I can measure PAR values and adjust my lighting schedule accordingly. It’s a game-changer for anyone serious about reef keeping.