Red tail sharks keep dying help

Question for you all. I have a tank that's almost five months old. I have 12 fish. 8 septa tetras and 4 white skirt tetras. Two months ago I got a RedTail Shark a two weeks later it died. The local fish store replaced it. That one recently died. Last week they replaced it again for me and this one died within four days. . I would feed it flakes and that's all. My water levels are great. No ammonia. Nitrates are at 10 and Nitrites are zero. PH is 7.0. My goal is to have a healthy Red Tail Shark. 29g tank. Any suggestions? I was thinking maybe different food for them. My substrates in my tank are snow colored rocks. So light colored rocks. Would that be the reason why they keep dying as well. Love to hear any suggestions.

 

better food would work. try bloodworms. water parameters?

 

What do you mean water parameters?

 

better food would work. try bloodworms. water parameters?

what do you mean water parameters? I test the water weekly and everything is good.

 

i mean like ammonia, pH, alkalinity, etc. we need numbers, not reassurance everything is fine.

 

i mean like ammonia, pH, alkalinity, etc. we need numbers, not reassurance everything is fine.

My ammonia is zero, PH is 7.0, nitrates are 10, nitrites are zero. My alkalinity is 80, hardness is soft.

 

Question for you all. I have a tank that's almost five months old. I have 12 fish. 8 septa tetras and 4 white skirt tetras. Two months ago I got a RedTail Shark a two weeks later it died. The local fish store replaced it. That one recently died. Last week they replaced it again for me and this one died within four days. . I would feed it flakes and that's all. My water levels are great. No ammonia. Nitrates are at 10 and Nitrites are zero. PH is 7.0. My goal is to have a healthy Red Tail Shark. 29g tank. Any suggestions? I was thinking maybe different food for them. My substrates in my tank are snow colored rocks. So light colored rocks. Would that be the reason why they keep dying as well. Love to hear any suggestions.

Mysis or brine shrimp.
Small wave maker for some current which they appreciate, they are a river fish and having a little current may help keep them alive?