Have you checked the medium for salt buildup? This will drastically drop your pH and keep it down no matter what you try to do, and you will have to flush the medium clean.
khyberkitsune Reviewed by khyberkitsune on . ph going down in d.w.c hello all well im stumped iv got a plant in a dwc 20ltr is all going well but the ph is going down (not up ) . now iv seen on the net something that says i need to up feed if ph goes down .or was it take feed out .lol so if any one can help ...... iv looked for the post iv seen all day but now joy. im setting the ph 5.7 to 5.8 on the dot after a day its like 5.5 . iv got ph up but id like to know y it doing it thanx to you all :thumbsup: Rating: 5