So i picked up a used 55 gallon which had sat for over 4 years with gravel from what was left from the tank with dead fish chichlid carcasses in the bottom after about a month of heavy cleaning inside and out as well as top to bottom to get all the calcium off only used hot water and razor blades and sponges to clean. After cleaned i replaced every thing from new gravel went with 50 lbs of black rock from
lps. Went with two 24" versa tops and a 48" single strip light. A fluval 306 canisrer filter set it up as it came so charchol in the first basket bio beads in the second and the foam in the botom basket. I have a aqueon pro 150 heater running at 74 to 78 degrees and i have the intake on the filter 2 inches from the bottom and is on the left side of the tank and i have the out take two inchs below the water line on the right side it angles to the left so it creates some circulation. I cleaned the tank had water sit for two weeks to make sure no leaks then emptied washed rock added it to the tank filled it for one week then got filter and heater cleaned off all filter media primed filter set heater let run for another month with a 50% water change then added three sepea tetras and decorations. Before adding fish did one more 50%
wc then added tetra aquasafe to tank let bag with fish float in top of tank the fish and water went in to tank after 30 mins. So were I am at now is that it has been two weeks and one of the serpa tetras is a bully I still have only 3 fish in there was waiting till next friday to get more. Why is my serpa being so mean too the other two? Is it because he needs friends? Also I feed them only every other day no more then say the size of a penny for the three of them my chemical test reads as nitrate 20 nitrite .5-1.0. Hardness 150-300. Chlorine 0. Alkalinity 180-300. Ph 7.8-8.4. Same readings for the last 3 days were much higher when first started two weeks ago was told to wait to do a 50%
wc for at least a month after adding first fish. I know there is a lot of jumbeled info and questions in here so if I can get any help it would be great