just wanted to say hi -- I've joined this forum because I have a few questions that need to be answered.
I current have a 90 gallon tank that's been stocked for about 7 months (started in february) and i'm having problems with PH.
Alittle while ago, the tank had no problems -- but today it had a bad bad smell (probably some type of issue with cleaning) and ph was under 6.0!! I was so scared, I did an immediate water change and gravel vacuum and also I cleaned out the fluval 405 cannister filter.
I changed 2/4 foam pads, rinsed the media in my tank water (inside a bucket) and completey cleaned out the inside of my filter.
I noticed a lot of red gunk in the cannister and it was deep deep red. kinda like blood
I did a ph test of my tapwater, and found that the water is at least 8.0+, for a while my water was fine (between 7.4-7.6).
I always did weekly water changes(25%-30%) & gravel vacuum's, and I've done 4 water changes within the last 4 days -- including the largest one today (about 70% worth) I noticed when I came home and all my fish were at the botttom not swimming, and there was like acid like white burns on my rasboras' tail. once I changed out the water, the fish became more lively -- I was contemplating about using a ph buffer, but I think I've seen poeple have bad experiences, and the last thing I need is a wipe.
I don't know exactly what I've been doing wrong.
Ammonia = 0
Nitrates = 0
Nitrites = ranges between 10-20ppm
I have a planted tank and I have close to sand gravel (fine gravel).
I also have 2 ceramic decorations and the plants are amazon swords (grew from 3 to 10 in 4 months).
I'm just listing what I may have and what might cause problems (ceramic decorations).