So I got a new 125 gallon tank. I decorated it with slate stones siliconed together with ge window, door silicone without the mold inhibitors. I let it cure for almost 2 weeks before adding it to the tank. I rinsed it all off in the shower before adding it to the tank. I added gravel (rinsed off) and some decorations. I filled it 2/3 fresh water and 1/3 water from current tank. I made sure the ph and temp of the new tank were as close as possible to the current tank. I transferred the filter directly from one tank to the new one. then I transferred the fish. after the first night(Sat night) the pictus cat died. day 2 by this evening 6+ platys are dead. I still have 8 cories, 2 loaches, 4 skirted tetras and one irredescent shark in the tank. I added activated carbon to the filter and prime. filter is good for 175 gallons. tested water 0 amonia, 0 nitrite, 10 nitrate, pH is about 6.5, temp is 75 degrees, it has 2 air stones and a spray bar. I have no idea why they are dying...what should I do? I took out all the ornaments, everything except the gravel and did a 85% water change...I hope it works...
Since when is religion going to cure fish, the principles of biology, chemistry, and a bit of physics are factually the only main things that have to due with life inside an aquarium.