I've Been dosing Calcium and Alkalinity with BRS Pharma additives using a Neptune DOS and 2 BRS jugs. This worked well but I decided to start dosing Tropic Marin Part C to help make up other trace elements lost. I did the Part C manually for a bit but I'm lazy so decided to add another DOS (when they are back in stock) and replace the gallon jugs with something nicer.
I had a Neptune DDR years ago and normally like most of Neptune products. However, after reading the reviews of the DDR and the problems they have had with the Optical Sensors (may have been fixed with the V2 sensors) and the unsealed circuit boards under the top I decided to go a different direction. I got 3 of the Simplicity 2L Modular Dosing Containers for about half the price of the DDR and plan on adding cheap optical sensors and making my own DOS connection cable as described in this thread,
Apex DOS DIY level switch . This should give me the same functionality of the DDR at about half the price and have 3 containers as opposed to the 2 of the DDR.
I ordered the 3 containers and have them sitting with water in them as a leak test because I remember reading at least one review that said one came in leaking.
I also ordered this cable,
MOLEX 245132-0650 , that I plan on cutting in half to make 2 DOS cables which will give me 4 optical connections and DOS Volume Tiles in Fusion. All I should have to do is following the wiring diagram in the above thread and connect these
2.54mm connectors to the 6 pin cables and plug right into the
optical sensors .
I don't plan on using the float switch mount in the containers as I am afraid the cheap optical sensors will leak like the V1 DDR sensors did. Once I confirm the cables and sensors work I will drill the back of the containers around the 4 ounce level (not positive that is the height I will use) and attach the sensors there so that the back end of the sensor where the wire comes out will remain dry.
Now I just have to wait for all the orders to come in and get soldering.