I had a Hydor Pico 500 (I think) doing the dosing for a while, and it is noisy, weak, and gets airlocked easily. I have much better results with AS MiniJet 606's.
Thing you have to remember is that they are running only a minute per day, so if they collect air for some reason and can't purge it quickly they won't work so well after a couple of days.
Also, if you plan to put the container underneath your tank, you need a certain wattage to get the liquid delivered up to the tank rim. I had to lift up some containers a bit, sitting on the bottom of the stand the pumps turned out too weak. Keep in mind you can easily adjust the dosed quantity by sizing the nozzle on the end of the tubing.
Not sure about an universal way to connect the pump and the airline tubing. I use plastic oral syringes to step down the diameter, and connect the syringe with another little piece of vinyl tubing. Barb reducers would work, I guess you could even use one of those $1 plastic checkvalves, open them up, and use the housing as a reducer.
|