Last month, I discovered and successfully used “mosquito dunks” dissolved in my watering can & or “mosquito bits” sprinkled onto my soil. (Can be one of theother depending on which format you prefer ) but it comes with a lot of warning about toxicity so keep away from pets and don’t breathe it in. The brand I got is from Summit- clear plastic container and a big bright yellow and red label.
I’m not sure if it’s allowed, but the product Links below are just to show you what exactly I’m talking about. I have no affiliation and just chose these sellers at random based on having pics that marched the product I have on my shelf. I’ll edit my comment to remove if necessary!
“Dunks”: 2-Pack Summit Mosquito Dunks https://www.amazon.com/dp/B01LYCI7E3/ref=cm_sw_r_cp_api_i_VXdwFbS00JBTZ
“Bits”: Summit Responsible Solutions Mosquito Bits - Quick Kill, 30 Ounce https://www.amazon.com/dp/B0001AUF8G/ref=cm_sw_r_cp_api_i_DZdwFbD8S9MJN
I’ve actually seen them on amazon and at my local pond shop