Those small stones clog fast. Try to switch them out and boil them in hot water to try to clean them out. One per bucket is not enough you should have 2 or 3 per bucket.
Zandor Reviewed by Zandor on . bubbler buckets question.. I have a 1/4" airlines going into each bucket with a NEW quality 4" stone in each bucket. It is run by one of those $10 air pumps from WallyMart. I use the ones that are set up for 2 lines per pump. Each line goes into separate buckets. My problem is these things work well the first 2 to 4 weeks in flowering, and then some of the quit working -- they just don't put out much if any bubbles anymore. Of course this happens near the END of the flowering cycle when it becomes difficult to get Rating: 5