Yep, used it and their entire line of products as well for a while along with their products for aquatic plants. The local store near me only had their PL product, which is their basic "all purpose" bacteria product, so I purchased much of their product line from
MicrobeLift USA.
I dosed according to the recommended schedule and only paired the products that they recommended to pair with each other. This constant dosage recommendation for some of their products is what can cause using their product to become quite expensive. I did this for an entire season and did not get the impression the Microbelift made a noticeable difference. Also, take note that some of their products are not recommended to be used at the same time.
I never could properly judge their
Sludge Away and
SA-Booster product, but these type of products that break down complex organics, such as dead leaves or other decaying organics, are known to actually work since the usage of these type of products are used so often to treat outhouses, lakes with an accumulation of organic waste, and other septic systems. However, proper pond husbandry suggests to not allow organics to build up , but, if it is unavoidable due to the shear volume of plants in the pond or due to the pond's construction, then this might be a worthwhile product to try out.
The only product I would recommend is their
Calcium Montmorillonite Clay. Ultimate Koi Clay (in the same hyperlink) is good as well along with
Thrive Koi Clay. These clay products is an excellent additive all around, adds micro-nutrients to improve the microorganisms in the water and filter, add nutrients to help the fish's color, and acts as a natural polymer to help increase the water's clarity. Mixing these clay products into fish food is quite common as well in homemade fish food recipes.
If you really want to try an enzyme or preventative care product, then look into
KoiZyme. It is just about the only preventative care, all natural, product that I constantly read high recommendations for its use coming from hobbiests that are quite serious about their fish. I don't know if it truly works, nor know anything about its efficacy, but, according to hobbyiests that I respect and trust, it is held in high regard. Be careful with anything that involves "preventative care" since
some products out there will, that is over a period of time of usage, actually boost the resistances of the organisms that they are trying to prevent from hurting the fish.
Watchout. You might spend more money than you realize when experimenting with these products.
Now, I just use the koi clay, and, on occasion, would use the KoiZyme.