Pondworx Pond Bacteria - Concentrated & Formulated for Water Features - Safe for Koi - 16 Ounces & Treats up to 2,500 gallons of Water

I've used this product for a couple of years and have been pleased with the results. It's easy to measure and disburses easily. It has kept our pond water clear even though I'm not great at algae control. This is not an algaecide.

OK, to be fair, I'm just assuming that this is a good product. Frankly, the juice in the container looks like greyish water. That said, I've added it to my pond, and is seems to be effective.

Helped with clearing up the algae and water clarity within a few days. Will need to repeat but good stuff

Water is Clear. Although I bought this to kill algae and then found it doesn’t kill algae. Still a good product. Would buy again for muck control.

Update: this worked well at first then seemed to cause more muck than it got rid of and we lost a lot of blue gill. ******************************((( We have a fairly large pond (@ 1/4 acre and 8 ft deep) and have koi so did not want anything that was toxic to control the algae. This combined with the dye works well. We had a lot of algae on the sides of the pond, my husband scooped as much out as he could then added 1/2 gallon of this and it cleared within a week. We had a drought that almost emptied the pond last year, then received enough rain this spring to fill it back up so the good bacteria needed to be restored, which this did.

I am thrilled. So much sludge, Years of build up. Put a gallon of this in my pond for five weeks and I can actually walk in the shallow end without sinking into half foot of yuk. I am on solid footing. Amazing. Not all the muck is gone, but we have is a very good start in a reasonably short period of time. I am hopeful progress will continue The pond looks great. Last year there were islands of dead filamentus algae popping to the surface. It was pretty gross. None of that this year. The pond is not without algae. Is any pond? But it is coming under control. It was vicious cycle of adding copper sulfate to kill the algae and by the way also the good bacteria, adding a muck reducer or something like that, watching the algae return in a couple of weeks, adding copper sulfate, etc. etc. etc. All this creating sludge and a wonderful algae environment. This summer, it has just been this product. It does not kill algae, but apparently has made it harder for it to thrive. With the recent hot spell I suddenly have algae blooms and may have to add an algaecide. But in past years, I would have already added algaecide three or four times. If this product continues to work as well as it has for the past few weeks, I am confident that next year there will be no more need copper sulfate. I'll let you know how it goes.

This is a rip off. I'm no dummy. I followed all instructions on the container for my Koi pond of about 3,000 gallons. I got no results at all. In fact the water apears to be worse. Don't waste your time or money!

Very satisfied with this bacteria bottle, my pond seem to get in the rhythm of new pond and on track, all fish very happy DP far snd water cleared!

My small koi pond was full of algae due to direct sunlight for more than 10 hours a day. Despite 2 UV lamps algae still cover 70% of the sides and base. 2 weeks after applying Pondworx the base and sides began to clear up to 40% and the aeration pumps also became more vigorous! Bought second bottle already!

My garden has a very large natural pond which unfortunately had a problem with biofilm. I used the full container of PondWorx Pond Bacteria and the following day the pond was much improved; a couple of days on and the pond has greatly improved and the water is clear. I can actually see the fish again, which by the way are unharmed. I would definitely recommend and will continue to use periodically or should the pond have another problem with biofilm. Depending on the size of your pond it could become expensive, however this works.

This bacteria works great. I start using it in the spring and before long, maybe a couple of months all the sludge in the bottom of the pond is just gone. If you want to accelerate the process, I noticed if you add an air hose to the area it works even faster

Efficace pour éliminer les algues filamenteuses

Very good