These are what you should be shooting for and should ideally have Temperature: between 75° and 80° F and constant - Should not fluctuate much Ammonia: 0 ppm - Toxic if not 0 Nitrite: 0 ppm - Toxic if not 0 Nitrate: < 10 ppm - Can be toxic to livestock if too high pH: between 8.1 and 8.4 Specific Gravity: 1.024-1.026 (1.025 is ideal)
I when to Petco because I little low on money so I need to buy a test Kit I just check salinity and right now is on 1.023 ammonia was good but both test my nitrate was high. Everything I got so far sorry for not having all information
Welcome to the hobby and Boston Reefers. How long has your tank been set up? Was it started with live rock or dry? What did your cycle look like? Tank size, equipment, husbandry(water change frequency?) did you quarantine? The questions can be endless so just try to inform us of the circumstances that have lead to your current position. Keeping fish alive is one of the easier parts of the hobby so something is fundamentally wrong IMO and if you have that trigger and have killed an eel and an angelfish you haven’t exactly adhered to a beginner list of fish. Relying on petco is a mistake. REEF SLOW and research research research. The internet is filled with viable information that is easily accessible on this forum and others. How fast did you stock the tank? When your fish died did you find the bodies or were they acting off beforehand? Description of their behaviors prior to death may help us narrow out causes.