No you don't need it, if you are unconcerned about the smell. The filter is to reduce/remove smell and the pre-filter is just to prevent the filter from becoming prematurely clogged.
I feel like even if one of your neighbors gets a momentary whiff, they won't clearly be able to identify where...
I find that they *can* still germinate at lower temps, it just takes longer. (usually about 1 week in a 70ish degree room)
It's definitely risky tho, not a good plan if the seeds are older- they can get soggy and die before sprouting sometimes.
I can't cite specific incidences, but I've used various expired ferts numerous times. I would say in general, as long as they have been kept in reasonable storage (not wet or overly hot) they've always been fine. My houseplant food container is (sadly almost empty now) almost 30 years old, and...
The dark green leaves appearing are the plant trying to get more energy for the root, because she still wants to be pollenated. That's why she's throwing so many fresh pistils. Sometimes, you just have to give them a deadline and cut, no matter how much they want to live.
#8
@SmokingWings might also be curious about trying ez hydro.
I'm seriously torn between my next grow being hydro or maybe trying swick, or also might be lazy and change nothing :lot-o-toke:
I'm curious what is special about those units to make them good for 'side' lighting vs. any other kind of light? They seem expensive (per watt) and I don't see a reason for them to be that expensive.
I'm kind of wondering if there is some excess something coming in with your water, maybe take a sample to a local fish store and get it tested ?
I feel like cal-mag should be used less frequently too, until the plant/s are larger. Possibly might even be enough in your water already for young...
Are you putting cal-mag and epsom in every time you water? Are you putting the cal-mag in and letting it sit for some time (at least ten minutes) before adding anything else? (yes that is how it should be done)
Is the epsom the only food you are offering? - ok you answered this already, your...