I have the same 4' 4 bulb t5 fixture (same fixutre but branded by a different company) as the iPower one you linked, and it works well for my vegging purposes. It puts off manageable heat and keeps plants healthy/vigorous enough for up to four or five months before they need to go outside. But...
I know this thread seems kinda dead, here are a few pictures to send it off with :)
Pink Tigers
Brazilian Starfish, Trinidad Moruga Scorpion, Black Cobra, Yaki Brown, Naglah Brown, Pink Tiger
Best of luck!
Visit me on IG if you want, check sig
.
What is your ppm/ec?
What kind of nutrients are you using?
Are your nutrients self ph balanced?
Are you using a PH Down product? (the General Hydroponics bottle is known to cause algae growth in DWC systems, lots of posts on this forum)
edit - I re-read your OP, see you're using ph down...
HAHA, nice! pepper bonsai ftw!
I totally don't mean to hijack your thread, I just love the idea and wanted to share that I have a couple pepper bonsai going on at my desk at work, lol.
The Purple Flash is perfect for this because it naturally grows super short with small leaves, but the...
Maybe natural variation? If it is a good pod, save the seeds and look for the same disreable traits in the progeny.
I also want to mention that I have been noticing a LOT of so-called "breeders" are just making crosses, leaving them in the F1 status and NOT breeding their stock to near inbred...
A long time ago, I had an issue with PH fluctuations in a DWC setup with hydroton in netty pots. In my situation, after working with it and lots of testing, I found that the PH shifting was because of rotting root material.
I remember it all starting a week or so after I had punctured the air...
It may or may not be worth it economically, but it would be worth the experience. You will get to know the plants needs on a whole new level.
Maybe do some extra searching for low-cost DIY options, or crazy specials.
Or, even look into other hydro-type ventures. I not usually, but sometimes...
For those interested, I just updated my IG (link in sig) account with three videos of all the plants next to each other. You can really see how the THSC Black Scorpion tongue has neon-greenish leaves with purple pods, and the Pink Tiger has a super dark purple stem. Anyways, check it out if you...
Yaki Brown
Fidalga Roxa from the latter wave - The green bottom leaves are from growing indoors, the rest have darkened up VERY nicely since being put outside.
Yaki Brown - from the top lookin down
The Purple Flash is hiding under the Yaki Brown, just to its right. The Purple Flash is...
I am growing my Black Cobra, aka Goats Weed for the second time this year. I topped one, one year, and did not top the other in a consecutive year, so no side-by-side comparison. But I can say that the plant that was topped tended to put more of its effort into a primary branch, even when...
Purple Jalapeno just about full-ripe
I tasted this one, and whatever was crossed to get the purple color brought through a little of its flavor, making the jalapeno taste a little bitter...
I successfully propogated a cherry tree (small branch of course) using air layering. It's a fun process to toy with. I suggest buying a syringe to inject water if the moisture lever ever falls, which it very well may depending on how you close off the ends.
Just a suggestion from experience...