In The Mix E-Newsletter- June / July 2018

In This Issue

GridBee® SN Series THM System Design Improvements

Medora Corporation continually makes design improvements on its industry-leading GridBee® SN Series THM Removal Systems based on in-field data and Customer feedback.  Many of these improvements are small over time with the end result being better and better performance.  Higher flows.  Less horsepower.  More efficient.  100% Proven and Performance Guaranteed.  Please feel free to contact us to discuss these improvements.

Did you know?

GridBee® SN Series THM Removal Systems not only provide effective spray aeration but also full depth mixing.  This is an important consideration when evaluating THM removal systems.  GridBee® SN Series THM Removal Systems are also:

  • Scalable & portable.
  • Install while tank is in service.
  • No divers needed for placement or service.
  • No need to enlarge the hatch.


Check out our quick and simple 6-minute video on design considerations for THM / VOC Removal!

Cyanotoxins And Drinking Water

Water systems are on the lookout.cyanobacteria (blue-green algae) bloom shown with secchi disk

Waterbodies across much of the world are experiencing more and more cyanobacteria (blue-green algae) bloom issues.  Where there are cyanobacteria blooms, there are also elevated chances of cyanotoxin release into the water.  

Cyanotoxins are no laughing matter and have long been known to be a danger to animals (especially dogs) and humans too.  It only compounds the cyanotoxin problem if an affected lake or reservoir is being used as a raw water source.  All one has to do is look at Salem, Oregon as an example how cyanotoxin detection in finished water can turn a water system upside down in a hurry.

In order to better understand how cyanotoxins may be affecting drinking water systems across the country, the US EPA issued monitoring guidelines under their "Fourth Unregulated Contaminant Monitoring Rule" which we included below.


US EPA Fourth Unregulated Contaminant Monitoring Rule

Per the US EPA website (source:

"The 1996 Safe Drinking Water Act (SDWA) amendments require that once every five years EPA issue a new list of no more than 30 unregulated contaminants to be monitored by public water systems (PWSs).  The fourth Unregulated Contaminant Monitoring Rule (UCMR 4) was published in the Federal Register on December 20, 2016. UCMR 4 requires monitoring for 30 chemical contaminants between 2018 and 2020 using analytical methods developed by EPA and consensus organizations. This monitoring provides a basis for future regulatory actions to protect public health."

Of these 30 unregulated contaminants, 10 listed are cynotoxins.

Ten Cyanotoxin Chemical Contaminants
  • total microcystin
  • microcystin-LA
  • microcystin-LF
  • microcystin-LR
  • microcystin-LY
  • microcystin-RR
  • microcystin-YR
  • nodularin
  • anatoxin-a
  • cylindrospermopsin

In the event of one of these cyanotoxins exceeding the minimum reporting threshhold, the US EPA has put forth communication recommendations for water systems.

They can be accessed at:

The EPA also has many other resources to help public water systems deal with cyanotoxin issue.


SolarBee® is helping solve cyanobacteria problems in over 400 lakes & reservoirs.

Circulation by its nature helps the overall health of any waterbody.  By creating specific types of circulation, various water quality objectives for your raw water treatment can be met.  Problems such as taste & odor issues related to cyanobacteria blooms and, iron, manganese and H2S issues can be reduced and/or eliminated.

Over 400 lakes, raw water reservoirs, and ponds have been restored worldwide with SolarBee® &GridBee® long distance circulation technology.  By reducing the levels of cyanobacteria, less MIB and Gesomin is released into the water column thereby reducing taste and odor issues.  Long distance circulation technology has provided carbon savings in the drinking water treatment plant and/or chemical savings in the lake.  


Some have even reported savings over $500,000 per year! 


Watch our 4-minute Video on Cyanobacteria Control Mechanisms in freshwater lakes, reservoirs, and ponds.

More Lift Station Wet Well Success

GridBee® AP500 Wet Well Mixers are having a substantial and beneficial impact across the United States.  Case in point, we received the following quote from one of our Customers:

“So far the three units (GridBee® AP500 Wet Well Mixers) we have installed are working great, we have seen a dramatic decrease in alarm calls due to grease or debris buildup on floats or other pump controls.” PD, Massachusetts

Mixing your lift station wet wells is proving to be an excellent strategy for increased wet well performance with reduced pump clogging and more pass through.  Access videos and learn more here!

Hurricane Season Is Just Starting,

And SolarBees are up to the challenge.

SolarBee® Lake Circulators are installed across the United States including areas prone to hurricanes.  This past fall we received the following report from one of our Customers.

"[We have] an SB10000 in one of our larger stormwater detention ponds.  On 9-10-2017 Hurricane Irma (known here un-affectionately as Big Irma) blew at a recorded 142 mph very near our SB10000. I stayed at my condo and took the attached photo looking south just before the calmness of the eye occurred ( from 142mph to 0mph in 5 minutes until the eye passed me.  Judging from the location of the pond, the path of Big Irma and my condo, it's safe to say the SB10000 was right in the path too and the 142 mph sustained blow.

On 9-12-2017 I drove by the SB10000 location and noted that the machine had dragged its moorings a few dozen feet toward the west but was still operating as if nothing happened at a time when 77% of  [our area] had no electricity.

I attached a photo taken a few years ago when an educational sign was installed on the west bank of the pond, and another photo taken on 9-12-2017 from the same pond bank that shows the same sign to give perspective. If you zoom in you can see a white fence in the background that didn't fare as well as the SB.

On the next service call maybe the BeeKeepers will reposition the machine.

I have to say how thoroughly impressed I am with the design and quality of your product."

It was great seeing you at the AWWA ACE18!

Thanks to everyone who stopped by to see us!  It was a great show and many great conversations were had.  We're looking forward to helping people across the country and the world solve their water quality problems.  #makewaterbetter


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