I first got this product in 2011. I have used it many times over the years. Originally, I got this product sent to me specifically to review and I did. At the time I did a video on it which is a good way to learn about the product. This product works best with freshwater fish or marine fish in water with salinity levels close to yours. I still own and still use this product for acclimation and for dosing.
There are limitations to the product.
The biggest is that it does one bag of fish/corals at a time. It will manage a pretty large bag.
The second is that you have to refill the drip cup when it empties so the process can continue.
Possibility of getting fish store water in your tank
The benefits of the product
Uses the the bag the fish comes in
As bag itself is in water temperature acclimation is direct