First off, sorry if this topic doesn't exactly fit this thread. I'm just making my best guess. EDIT: Oh look I got moved to a better forum I hadn't noticed before. Thanks Mods! Now to the point. I have three aquariums- low tech planted 5 and 10 gallons and a 20 gallon I plan to turn into a high tech planted tank. The PH of my tap water tends to be pretty high. It starts around 7.8 and hits 8-8.2 after being out in a cup for two days. The tanks all tend to hover around 8-8.2 PH. I decided to test the PH right before and about 20-30 minutes after my last water changes. Only the 10 gallon showed a noticeable difference. It was 8 before the change and 7.8 after. The 5 and 20 gallons stayed at 8. Note: I'm using the API high range PH test from their master kit. I struggle a little with telling exactly what the color of the test water is compared to the chart, but I should be close. As far as tank inhabitants, the 5 gallon has 1 male betta and 2 Nerite snails. The 10 gallon has 7 guppies, 1 amano shrimp, and a bunch of assassin snails. The 20 gallon has 4 zebra danios, 1 pearl danio, 5 neon tetras, and a handful of assassin snails. I would like to add shrimp and/or freshwater pop-pom crabs after I have it fully planted and stable. My fish seem healthy to me, however I have lost bettas earlier then I would expect. As in they only lived 1 year- 1 1/2 years. I stay fairly consistent on weekly water changes and use seachem prime, however, I might miss a week every once in a while. I'll never leave any of the tanks more then 2 weeks though. Could the high PH be what's affecting my fish's life spans? Note: I've only had 2 bettas and I'l admit I wasn't using a water conditioner for the first 4-6 months I had the first one. I've learned better since then I'm mostly worried about plants being affected by high PH, especially in the 20 gallon I want to turn into a high tech tank. I've had issues keeping plants in my small tanks that theoretically should have been fine. Specifically, water wisteria, water sprite, and bacopa australis. Don't ask me exactly what i've had in each tank, because I tend to use similar plants in both. I have successfully kept anubias nana, cryptocoryne wendtii, java fern, and marimo moss in the 10 gallon tank for many years. I added micro sword and bacopa caroliniana around a month ago, and both seem to be doing fine right now (knock on wood) I've kept anubias nana petite, marimo moss, and a cryptocoryne plant I can't remember the exact name of anymore (sorry) for a couple years in the 5 gallon tank, It also got micro sword a month ago, and that also seems to be doing fine (knock on wood again) Both tanks have eco complete substrate and are dosed with liquid ferts, but no root tabs. Let me know if you need to know exactly what ferts, and what the other water parimaters of the tank are. I'm worried about the PH now because I'm afraid of how it will affect the high tech tank I want to make. I'm not sure what plants I want right now, but I'm concerned any more sensitive and demanding plant will be negatively affected by the PH. Should I actually worry about it? Thank you for taking the time to read this long post, and hopefully you can help me out.