Ok, I love Spiney Eels but I cannot keep them alive, I have had 1 Fire eel, 2 tire tracks and 2 Peacocks and they have all died within 48 hours of placing them in my tank, even tried 3 different tanks. Amonia 0, Nitrite 0, Nitrate 12, PH is high (my tap water is around 8.4) but I'll retest the...