4.94.9 out of 5 stars
52 product ratings
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48 reviews

by Most favourable review

Envii Septic Tank Treatment and Cleaner

Comes in large tablet form..dissolves easily in water { wc}..seems to work fine, only 1 application soo far.
Quality seems ok..price also seems fair..
Be careful when opening the packet.. ..don`t release other tablets..keep dry..
based on present experience ..would buy again..
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by Most critical review

Unnecessary for normal use.

The Scottish Water expert on septic systems said these are really not necessary in most instances because the septic tank should produce enough bacteria to digest the waste material naturally. liquid levels will rise and fall depending on rainfall. The best way of gauging how full a septic tank is, is to use a dipstick. The level of sludge in the bottom will show up easily. I could feel where the sludge began and where the bottom of the tank is.

He recommended not using lots of strong bleach or other cleaners because these will destroy the natural bacteria balance in the tank. These tablets would be useful to restart a tank that has been bleached out.

I have put several of these tabs down the toilet, per instructions and not noticed any difference for the better or worse.
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by

Brilliant

These tablets are gr8 I would never believed such a small tablet would be so gr8.
I have a treatment plant for my house and it was beginning to smell. I blame the over use of bleach because I had exactly the same treatment plant in my last house and no problems with that.
So I bought another for this and after a while it started to smell really bad all through the house it was horrible.
So I purchased these tablets to see I was sceptical tbh but I was desperate and they are fantastic the smell was gone in a few days.
I don't know how they would work on a septic tank but I definitely would give them a try.
But all i would say is because it's not a mains sewage system take care of what you put into a private system and try to not put any bleach which will alter the balance of good bacteria.
But if your tank is smelly use this treatment 1st.
Regards Alister
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by

It works

Had a new sewage treatment plant fitted and with all the covid antibacterial products we were using we didn't realise we were killing all the bacteria in the tank until we noticed a smell we bought this product and in 3 days the smell had gone and a crust was forming a very good product we will be using it all the time nowRead full review

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by

Easy and seems to keep things flowing!

Seemed to do the trick.
Had a problem septic tank at my late fathers. Rodded then drain cleaner and seemed a little better but not great.
Used Envii Klear with a bit of hope about 3 months ago.<br>Seems like the blockage into the tank has cleared and to this time things seem to be working as they should.
I would recommend Envii at this time, all is flowing fine.
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by

Excellent product

I’ve used this product for s couple of years now having been recommended it by a neighbour.

We started to find that every now and then we’d notice a nasty niff that seemed to linger around the area above our septic tank. When really bad it seemed it was coming through the plug holes in the bathroom and toilet.

One of these tablets each month sorted it right out and also seems to be keeping the tank levels down too.
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by

Septic system treatment

I was having trouble with my septic tank system about a year ago. After getting the problem sorted I bought a packet of Envii tablets and all I can say is that after using this product for a year I have not had any problems with my septic tank system etc. Normally I would have had problems so I would highly recommend this product especially with lines connected to the tank. Read full review

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by

Septic tank treatment Product

easy to use & reseal .Also put a couple in the tank after it got emptied & seems to have eliminated smells . excellent product

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by

Septic Tank Bacterial Cleaner

It is too early to say what the effectiveness of this product is but it is extremely easy to use and I am hoping for good results/

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by

Lightweight with good features

The tablets are easy to apply provided a record is kept when the next one is due

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