Hello everyone. I am new at this I have wanted Koi for years and finally built a pond about 400 gallons with bog plants and a lava rock up flow filter. I have been running this for about 9 months with good results. I have since then set up a 15' X 4' swimming pool to keep fish in. I have several Koi and Goldfish in it and I am using a lava rock up flow filter on this also. I would like to if there is an online description of all the terms and names used on this forum? I do not know what they mean and would like to.