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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16
These replacement rolls are engineered to provide superior mechanical filtration
Marco Dry Rock Boulders (40lb / 18kg box) are a top choice for aquascaping
Ideal for systems with a 100 GPD capacity
Designed for use with ICP testing
Each outlet is equipped with independent power monitoring and individual LED indicators
Neptune Systems Lab Grade ORP Probe – Accurate ORP Monitoring xodis These replacement rolls are engineeredThe Neptune Systems Lab Grade ORP Probe is designed to deliver precise and reliable oxidation reduction potential (ORP) readings for your aquarium. ORP measures your systems ability to oxidize and is especially important for aquarists using ozone, where accurate ORP monitoring is critical for safety and effectiveness. This probe is not to be confused with dissolved oxygen probes, as it serves a completely different and essential monitoring purpose.
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