They are all snake oil and a waste of money. Easy money and plenty of manufactures and sellers willing to take it. A few years back you could find independent university white papers showing little to no value. With today's profit driven internet all you'll find are advertising and glowing endorsements.
Increase your aeration and circulation to reduce sludge. If the muck is mostly inorganic material the only thing that will work is mechanical removal.
Last edited by batman; 10-06-2021 at 01:48 PM.
The real Batman wears polyester! Don't be fooled by the plastic imposter.