Envii

The best.

Very rapid response

Great product

Cracking stuff . Really cleared up the pond. Didn’t upset the plants or the fish 🐟 like the fact that you can just squeeze the bottle to measure the liquid out before putting it in the pond .

Hope it works ok, difficult to tell, unless the plants all die 🤣. Service etc excellent. I live abroad in a hot climate, so will pass on the details to my local garden centre.