orp

  1. J

    Alabama Dry Goods Milwaukee ORP controller, Price drop $100

    I’m selling a band-new Milwaukee ORP controller (MC510). The box has been opened, but nothing has ever been plugged in or touched water. I was going to use this with an ozone generator, but ended up buying an aquarium controller with built-in ORP sensing. Unfortunately, I’m outside of the return...
  2. J

    Alabama Dry Goods BNIB Milwaukee ORP controller

    I’m selling a band-new Milwaukee ORP controller (MC510). The box has been opened, but nothing has ever been plugged in or touched water. I was going to use this with an ozone generator, but ended up buying an aquarium controller with built-in ORP sensing. Unfortunately, I’m outside of the...
  3. P

    ORP and Sulfur Denitrator

    I have a question for you @Randy Holmes-Farley I just installed a sulfur denitrator and my ORP has risen rapidly in the last 24hrs. I’ve read your article on ORP and know that nitrifying bacteria can affect ORP. I’m new to this type of reactor but from what I understand the goal is to create...
  4. P

    Dropping ORP levels

    Recently over the past few days I’ve been having times when the ORP probe in my reef tank starts to steadily decline despite me not being home and doing anything to the tank. I do not use ozone and I don’t typically have concern over the fluctuation until it goes outside of normal ranges. I dose...
  5. lostmojo

    Nitrates and ORP trouble questions

    So I picked up an apex to better track my tanks stats. I am running the ORP probe and reading around 170-192 throughout a full 24 hour period. My nitrates have not been tested in over week but they were 0 the last time with my skimmer running 24/7. i have a new tester arriving since i ran out...
  6. ReefKnight2

    Ozone- Enaly-200 installed on WB 220.6

    I'm thrilled to share the recent upgrade to my WaterBox 220.6 reef tank, where I introduced an Enaly-200 ozone unit. This form aims to provide an overview of my experience with the ozone system and its impact on my aquarium. Aquarium Details: Tank: WaterBox 220.6 Ozone Unit: Enaly-200...
  7. R

    60mV sudden drop in ORP after turning UV sterilizer on

    I know that most reefers would recommend ignoring ORP, and to an extent, I do ignore it, unless I see a sudden change. I just turned on my UV sterilizer, running at about 400gph on a dedicated pump, and my ORP dropped from 230mV (I know, it's a bit low already) to 170mV. I thought UV would have...
  8. NEFFx

    What if your ORP is going down?

    So ORP, always an interesting topic. That said there appears to be some correlation to bacteria levels and ORP, and clean water. So that’s my concern of the unknown. My ORP is on a downward trend, what does one do. Is Cyano imminent? Diatoms? Is everything ok? What are your thoughts?
  9. E

    Probe reading problems GHL AND NEPTUNE

    So I’m in the middle of switching from Neptune to Ghl and currently both are set up on my tank, but the probes are reading way differently the ph and orp probes to be exact, I went through and calibrated wash brown for each system and double checked with new calibration solution to make sure...
  10. blstravler

    Which Calibration fluid for Apex ORP and Salinity Probes?

    For ORP I found this - https://www.bulkreefsupply.com/pinpoint-orp-redox-400-calibration-fluid.html I assume it will work - even though it is not a Neptune specific product? For Salinity I know this will work -...
  11. schooleyosis

    Tennessee Apex PM1 PH/ORP PROBE MODULE

    Selling 2, Neptune Apex PM1 modules that I used for a little over 2 years. No probes included, just the module(s). Asking $45.00 (for 1 module), or $75.00 (for both); which includes shipping in the Continental USA. No low ball offers please. Thanks for looking.
  12. S

    Apex stuff and XR30 Pro Gen 3 LED Modules for sale.

    All prices shipped and payment via PayPal within the Continental USA. Neptune Systems Lab Grade PH Probe New - $50 Neptune Systems Double Junction Lab Grade ORP Probe New - $75 Neptune Systems Lab Grade Conductivity/Salinity Probe New - $110 XR30 Gen 3 Pro LED Modules New - $250 XR30/15...
  13. seastar

    Can Dinos cause really low ORP?

    So after reading Randy's excellent simple version of the guide to ORP, I get that ORP mostly is the battle between oxydizers and reducers. A reducer can be food, waste, dead things and probably a ton of other stuff. Would it be fair to draw a conclusion that Dino's killing microscopic things in...
  14. seastar

    Very low ORP

    Im thinking I must have a bad probe... that or something serious going on in the tank. I just hooked it up and to my surprise it was reading 43! I hooked up a micro-bubbler and it's slowly climbing up, but yikes. How was everything in my tank not dead if this was accurate? Fish seem fine, corals...
  15. LEOreefer

    O zone question

    I've been doing research on ozone in the reef aquarium. I am well aware of the risk and dangers but also well aware of the benefits. I know I could just run carbon with a similar effect. I would like to know how people have there ozone set up? I have a sca 50 gal with appropriate sized stand...
  16. D

    ORP Sudden Dips - Graph Included.

    So usually my ORP sits in the mid 300's for ORP but have recently noticed these sudden "dips." They are not necessarily at the same time every day and don't correspond to a dosing time. See below: All fish are accounted for and water chemistry raises no alarms. ORP is very hard for me to...
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