I'm still having ph problems in a tank I converted to dirt.
I used organic miracle grow capped with play sand. There was a bunch of disturbance after I put the fish in, which was a couple weeks after I finished setting up the tank. It brought up a lot of dirt so I tried to put it back down, and added more sand. I also washed the sponges and filter floss in the canister filters which were covered in dirt yesterday, and I emptied the filters and washed them out because there was lots of dirt in them, but I did NOT wash off the bio media which was/is cycled. The ph is actually not declining as fast now that I've done that, but it's still going down.
I've been doing fairly frequent water changes. I did another yesterday. Before the change, the ph was a bit below 6.6. I tested the water immediately after the change, and the water was about 7.0 which is what my tap water normally is. I tested a couple hours later, and it was closer to 6.8, and then I tested again a while ago, and it's closer to 6.6, so it's steadily going down again. It's been going as low as 6.0 which is as low as I can test.
Ammonia and nitrite were both 0 before the change yesterday and after the change, and still 0 when I tested just a while ago. I'm just not sure how I can get the ph stable. Someone said last time I posted that crushed coral would raise my ph but higher than I want it and keep it there, so I don't want to use that. Do I need to buy a buffer or something? What should I do? The fish seem fine, btw, but I still don't like the ph going down like this, and I want to add more fish to the tank, but definitely won't until I can get the ph stable for a while! If anyone has any advice, I'm all ears!...eyes...you know what I mean
Edit: I forgot about the gh and kh testing. I ordered a kit from Amazon, but the package was damaged, so I'll just pick one up at the store today. Can't believe I forgot about it though! Sorry about that! To you guys who want the results and to my fish of course
Crazy times with holidays and final exams coming up!