Hi! Im new here and a newb with fish ponds. I’ve learned a lot and been lerking for a while now. I have restored my fathers old cement fish pond with a 2.5’ waterfall. I think the pond is 400 gallons and I use an all in one pondMax SF1000 which is supposed to do a good job. Time will tell . Every few days the water level goes down about 1-2” but I’m still tweaking the water fall to keep it from watering the nearby plants. If I have to add an inch or more of water can I put the declorinator in the pond and then add the water from the hose? What’s the best way? I only have a 12 gallon bucket.