


APTUS - K-BOOST - 5LK Boost is an organic mineral stimulator that contains L amino acids in combination with potassium (K) and sulfur trioxide (SO3). WHY USE K BOOST? ? Stimulates the ripening of fruits and buds ? Improves the quality of the crop ? It is 100% water soluble and leaves no residue ? It has a high bioavailability ? Makes the final product more consistent HOW TO USE K BOOST? Use K Boost from the 5th to the 7th week of flowering. Mix 3 5 ml of product in 10 L
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4.7 ★★★★★
Based on 1360 reviews
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Product Reviews
★★★★★ 3
The smell.
It really does smell like coffee. Contrary to some of the comments, the coffee smell doesn't go away right away.
Waiting to see the results.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
★★★★★ 5
Utility
Effective product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
Natural tan /no orangy hands!
Mine came with the lotion, applicator mitt, and a facial can mist. I haven't used the facial mist yet but here are my observations for the lotion:
PROS
- finish color looked very natural. Not orange at all.
- no streaks / dark patches / missed spots (of course this has to do with the application as much as the product)
- can build darker tan with multiple applications
- did not transfer onto my clothing
- the "self-tan lotion"scent was present but not terrible
CONS
- slight self tanner smell
- made my scars look darker (not a product defect, my scars get darker from the sun too. Just mentioning in case someone has severe scarring /discoloration/ vitiligo to be mindful. First application I would say do full body. And maybe afterward learn to work around your darker skin spots.
I didn't use the mitt for application, but it's nice and soft and comfortable. I used disposable cheapy medical gloves because I felt like I may not get good enough control and might leave streaks with the mitt. (With practice though, I will definitely use it because it feels nice and soft.)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2024
★★★★★ 5
Works great
Color: Medium Glow
This works great and darkens skin to a beautiful light tan but does somewhat wash off the next day so it does require reapplying the next day. I would purchase this again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 4
A good starter kit
A really good starter kit, the tan isn’t orangey and applies pretty easily. It doesn’t get super dark. The lotion is good to make the tan last longer but wash your hands really well or they’ll have dark splotches. The spray isn’t amazing and can look streaky
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026
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