I had to leave home for 3 weeks and my plant starts got tap water (top watered) instead of my regular T-drop+nutrient solution drench from the bottom. My oscillating fan got unplugged, so they have had a good 3 weeks to breed. There are baby larvae EVERYWHERE on the bottom of my 1020 trays in all stages. I have some trays with very small seedlings (2-5mm tall) and other trays with faster growing plants that are 10-20cm tall. Grow medium is coco coir and perlite in 2-4" pots.

Here is what I have on hand:

T-drops

35% Hydrogen peroxide

BT

Fine mist sprayer with pump

I am worried about using H202 for the seedlings as I have had some die off when I did this in a hydroponic setup.

Suggestions for what to do to kill the larvae as quickly as possible without damaging my seedlings?

Hey all,

For DWC, is there a meter that can be used to tell you how much nitrogen, calcium, magnesium, phosphorus, etc is available in your water?

Aside from checking PPM and blindly adding what you think the plant may need, or changing your water, is there a meter you guys use? How do you know you the nutrient you're adding isn't already available?

Looking to do my first aerogarden hydro grow with a grow tent. I would love to have an app like the one pictured but the ones on Google Play have bad reviews. Does anyone have any recommendations for either an app (Android\Windows) or a website? I buy feminized,, auto flowering seeds online, so it would be cool add my new strain abd get the exact conditions to get the best yield. Looking for something that will track my grow for me and alert me when it's time to water, add nutrient or trim, keep a log with photos, and a forum or community would be nice. Thanks for any help.

I have a snake plant that was struggling in soil and lost almost all its roots due to root rot so I moved it to water and it has so many little growth points in less than a week, I'm thrilled and would love to keep it in water for as long as it's happy and thriving! My question is, is there a specific plant food I should use for it while it's in the early stages of regrowing roots? Should I look for a snake plant specific plant food, a hydroponic plant food, etc?

Broccoli and tomatoes should not be planted together in traditional gardening. Can I have them in the same media beds? How about different media beds in the same flow system?

What do :(

I didn’t grow these from seed, so I just bunched them up and threw them in a nest

Thanks! First time growing hydro. Starting with a small tower in a grow tent. I’m an experienced organic soil grower so this is very exciting. Got a lot of free seeds recently.

Not having much luck finding light cycle info for tomatos. It seems intuitive that you would use a 18hr on 6hr off, for the vegetative stage ( much like cannabis). Then switch to a 12hr on 12hr off to flip the plant into flowering.

Anyone have any advice?

Using a 315w cmh light, ventilation, fans, climate control, etc.

Can you throw bare roots into a hydroponic system? Or would the non sterile roots wreak havoc on everything else?