So I found out what's going on with these filters. And I don't think it is limited to just the can brand.
Apparently some of these filters are being refurbished and refilled with new carbon not that that is a bad thing but they are not filling them up all the way or not packing them right and...
I've been running the ebmboom 1000w cmh lights from Alibaba for about a year now and had no problems up until about four months ago now the ballast are dropping like flies I've had five of them fail on me in the last 4 months.
I sent one of the failed ones back 4 months ago and they still have...
So I've noticed the last can filter I bought the carbon seems to be loose and not Packed tight you can hear it when you shake it like it's not filled all the way up I'm afraid to install it and have odor leaks.
Here is my 12 plant 6 1000w cmh lights each turned down to 860w. I should have lowered the hoods closer to the plants but I didn't know how much cooler the lights were compared to the DE HPS bulbs i was running.
I'm not worried about the heat with 5 tones of mini split AC at my disposal. I would be if I was still running DE hps bulbs though.
Also I need to State I grow large trees (8-9 week veg) so penetration is a must for the canopy.
Cob growers what's the optimal square foot coverage say for a 4x4 area Per 100w cob or what ever is the highest rated wattage cob.
I'm running 1000w cmh lights but want to start tinkering around with DIY cobs.
That looks like my smartbee graph.
I water every 24 hours in veg. In a 50/25/25 Coco croutons/ricehulls/coco pith mix. And 3-4 watering in flower in 7 gallon pots.
I set the Threshold at 40% water content if it drops below 40% the pump will kick on for 20 seconds. Until the regular irrigation...
I couldn't keep my room cool enough for RW, I was getting this yellow fungus in the root zone even with 65f rez temp feedings and dry cycles with DM zone was no match for this yellow fungus shit. Now back in coco and no problems.
I'm having problems with the 1000w nanolux hps DE bulbs. they work for about 2-4 weeks than go out. I'm pretty sure they aren't compatible with my LF SW ballasts. bulb out put from ballast to bulb is 200v.
The nanolux HPS needs 400v.
LF SW ballast only put half that out.
got a whole box of...
one more thing I'd like to point out is that i did a couple test grows with a 630 cmh light.
and kinda had the same problem you did with the tops burning.
on the first test I veged under MH and flowered under cmh and the tops did burn a little in flowering.
next one I veged under cmh and...
The CMH'S would probably do better with AC cooling in a sealed room.
I'll try starting mine at 630 than 860 than 1000.
So that would be 12 cmh bulbs @630 watt each up to 1000 watts each by week 4 of flower. 18 plants total.