Lovibond 511570BT DPD 4 Rapid Dissolving Tablets

No its fine

No instructions in box

I used it to confirm my fears very easy to use

Defo showed tap water was full of chlorine

seem to work just like the ones I was using

I have a 12,000 litre koi pond which I top up using tap water which passes through a dechlorination filter. I tested three water sources as soon as I received these tablets:1. Water from the pond - no colouration.2. Water directly from the dechlorination filter - no colouration.3. Water directly from the tap - definite pink colouration.So, in a few minutes I was able to confirm that the tap water I use contains chlorine but that this is successfully removed by my dechlorination filter, and, that my pond remains chlorine free. Carrying out this test periodically will enable me to remain confident that my fish are not being subjected to the harmful effects of chlorine and will give me an early warning when my filter cartridge needs renewing. For me, these DPD 4 tablets represent money well spent.

Easy to use at a good price for peace of mind that our koi aren’t being subjected to Chlorine! They do work and give a light pink result for our tap water but a clear result for the pond after topping up using a water conditioner.

It works just rapidly