Septic tank bacteria

Prevents odour and clogging of septic tanks, cesspools and domestic sewage treatment plants.

Biologically and environmentally friendly!

Septic tank, cesspool and STP bacteria

Keep your septic tanks, cesspools and domestic sewage treatment plant healthy and odour-free!

Waste water tank for caravans & boats

Prevent odours and clogging with our biological products!

Stinking drain? Here's a biological solution!

A complete and effective approach to odour nuisance, that’s 100% organic.

Selection from the assortment

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Who are we?

Septictank-shop is a Dutch Water Tech webshop.

We have been supplying products for waste water treatment for more than 10 years. We believe in biological and ecological products and we work with the utmost care for the environment.

Would you like to know more about us? Click here.

You can also find us on

Secure shopping

Secure shopping and payment.

Fast delivery

Shipping costs from £4.95, free shipping from £75.

Perfect service

Good products and no fuss.

Satisfied customers!

Many satisfied customers throughout Europe. Read our reviews!

Customer reviews

Recommended! Good products and personal advice

At home we suffered from a sewer smell and the cause was the shower well. We had already used various products, so there was absolutely no unblocking. But the air did not disappear. That is why we phoned and enquired. I had the Anti Sewer Air Package 1 in mind, but because of the personal advice I was advised K27. That saved me half the money and it helped perfectly. So thank you very much.

– Max

Problems with septic tank solved in no time!

We have been living in Spain since January and have a septic tank there. The tank had to be emptied and then reactivated. This went perfectly with the BioSeptic+. We use it every week and as soon as there is a pipe ‘clogged’, we throw the powder into that pipe. After one day, the line then runs again. We have now ordered for the 2nd time. We still have stock, but our family takes this for us. That saves on shipping costs 😉

– Priscilla

Excellent service and excellent products

Fast delivery and I have been using your equipment for a septic tank and a ‘grease pit’ for two years now. The water that is discharged is crystal clear and does not smell.

Sometimes there is a smell from the drainpipe, which is also connected to the same drain as the tanks. Now I’m going to try to put stuff in there for the pipes, I don’t know if that works yet (it’s a holiday home and I haven’t been there for a while).

– Ingrid