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This product contains live bacteria, which promise to break down solid organic matter more effectively in the tank. This is almost immediately obvious, and fish waste, suspended matter and uneaten food will quickly be broken down which gives a 'quick fix' of a cleaner, clearer looking tank in a day or two...and it works. But. And it's a big but.
The organic matter is only broken down ready for the next stage of biological filtration, and produces nitrates, nitrites and ammonia all of which are potentially lethal to fish. If your main filtration system is not ready for this surge, or capable of dealing with it, this product can lead to disaster with spikes in toxins which will potentially kill livestock.
Really, this product polishes the living daylights out of already very 'clean' tanks with a good filtration bio-load balance... Don't buy it to solve problems with dirty tanks, it won't help and could prove the tipping point for disaster.
Love this stuff.....A little goes a long way, thank gawd as it's a bit expensive....after the initial full dose I now only put in a 1/2 of the recommended maintenance dose and it still manages to do a good job of keeping the water crystal clear. I have 6 planted tanks and glass cleaning drives me potty. Dusty glass really bugs me(just a tiny bit OCD with the tanks)....since using this I have really noticed how little I have to clean the ''dust'' from the glass and It seems to keep to other detritus to a minimum.Used Purigen in the past but VERY EXPENSIVE to buy and a pain to regenerate, still a fab product though..... but very happy with this and so easy to use and effective so will definately buy this again.....love Seachem products.
I have been using Seachem products for a number of years now and have never had a problem. They are quite heavily concentrated and so make sure you calculate the correct dosage for your volume of water using the instructions on the packaging. They are fairly eapensive compared to some of the competition, but last for an very long time. I have found it false economy to look elsewhere.
Bought pristine a week ago and used the full initial dose and one maintenance dose after my weekly water change. Haven't really noticed any difference if I'm being honest. Will continue to use after water changes but not sure so far. Possibly too early to tell if it works.