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In House was the original breeder and the #7 was/is the popular clone. A couple of other numbers floating around as well, but the 7 was from in-house
Ya in house themselves sell #7 #11 #13 and more then that but those are the ones I remember from shopping in the past!
 
I think it's too early to tell if the knock offs are any good :shrug: But the Grove bags I got in October have much taller tops then older versions I've got, so you can get a couple extra heat seals in them :pass:
I just cut the zip off and heat seal below where it was.
With winter here and kicking everyone in the nads, What's the coldest water temp you'll use? It been in the teens with highs in the upper thirties for a week where I am. My basement stays about 60* with that kinda weather. Thus my buckets with aerator stay about the same. Have two aquarium heaters, but get lazy sometimes...

68* seems the optimal for oxygenation, but what's your low?
I have done hydro at 64°F without issues. I have also gone as low as 62°F and the plants kinda slowed down @Mossy grows plants colder then that but I think her personal strains are being inbred for it.
 
Yeah, right. I thought it was just marketing honestly but Norden Seeds, where I mainly buy seeds, also breed their seeds for colder climates. Got "warehouses" in Spain and somewhere in Scandinavia.
 
I used to do hydro in a clone of one of those GHE 6 plant dripper/dwc systems. I did it under a 600W HPS bulb in a passively cooled room. I didn't even check temperatures, or pH, I just followed the GHE nutrition schedule. I didn't have any circulation or anything. Just an open window. Now 25 years later I can't believe it worked out but yeah.
 
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