Hi all. Thanks for reading in advance. Appreciate your time and looking forward to any suggestions, advice, tip, hint, links, reference etc. 10G, cycled>Sponge filter, pothos plant, ammonia nitrite nitrate 0, temp depends on room temp which is 22-26 C. pH? gH? I recently rescaped (sourced locally and DIY project) my 10G tank. Its current residents are one betta, and four neon tetras. (Four more neon tetras and java moss are in QT and will be added by end of june. Also a dozen RCS are on their way in last week of june along with catappa leaves, drift wood, java fern, amazon sword, water lily and anything else if its available at that time and suitable to grow in my sand tank) The scape (see image) consists of indian black limestone (rocks/slates) and substrate is of crushed gravel topped with black river sand. Everything here is black and natural, washed properly to take care of any external parasites. Since i read about vinegar test after using all, i now wonder how much my pH will be raised and how will it affect my residents (since all prefer acidic environment except the shrimps). I will be buying a pH test kit by end of june to determine that. All other parameters are fine and even the pothos is doing great. Fish are healthy and acting natural (except for one neon tetra who has some kind of liaison on his tail part since march and no one seemed to know what it was). The question is how much pH can the stone and sand in my tank raise? I know its hard to answer without knowing anything, but an approx min~max number will be also helpfull.