Just wondering whether anyone out there uses the liquid dechlorinators when undertaking large volume water changes, I.e. 10% or greater?
I ask as the processing rates on most of the in-line dechlorinators would mean that the pond refill times could be quite long.
There has also been a lot of discussion on other forums recently suggesting that the water companies have increased the chlorine content since the pandemic started, which will also impact the efficiency of carbon dechlorinators, requiring a slower throughput and shorter life (gallons dechlorinated before the charge is spent).
The filters are fine and water parameters good, but I’m losing water through evaporation and (very) regular cleaning due to high levels of mechanical debris. I’ve been looking at various new dechlorinators and there’s plenty of choice , but also started to compare the chemical dechlorinators against some of these for gallons treated and they look favourable when doing a large top up, both in terms of cost and time (fill rates).
"RE: Dechlorination" 10:30pm Monday 1st Jun | message edited once
joined: 25th Jun 17
last here: 4:57pm Yesterday
from: Selby, N.Yorks
I’m on a twin pod unit with (almost) new cartridges and after reading some recent threads got some DPD4 tablets to check how well they were working and found they are not removing all of the chlorine, even on a very low flow rate, and certainly less than would be required for any water change.
I’ve ordered some crystals but as I’ve never used it before I was planning to trial in large tubs/vats, rather than apply directly into the pond. I can then check the parameters of the “clean” water before transferring it into the pond.
I’ve been using the tubs this week to let chlorine gas off while I waited for a new dechlorinator to arrive and have been surprised at the variance in time each Fill has taken to clear chlorine. Anywhere between 6 and 36 hours! I’m not a chemist, so it’s unclear how this time is impacted by atmospheric conditions and the levels of chlorine in the raw water, but it’s food for thought!