I've been using this product for many years and I'm also used to old bottles with dosing caps. I measure my doses by the number of drops per container I used to fill up my reservoirs. I like to do it in such a way that the water is cleaned before it goes into the tank. This product is effective and I didn't want to switch to something unfamiliar, so I bought some empty screw top bottles with a drip spout. I tried several options before finding one that worked! If you search for item number B084RBMRHD, you should get 510 Center Spout Bottles (8 oz, 6 packs) Boston Round with Dispense Caps. These bottle caps are perfect for Kordon Amquel 4oz bottles. You will receive 6 caps that can be cleaned and reused on the original bottles!
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