... tetra no filter just the tank, water and gravel. So I bought a aqua tech5-15 gallon filter and I just put it in the tank without waiting 24 hours and The next morning I came home and my neon tetra was dead floating there. I cleaned the tank out completely and ran the filter for like a week with just the algae eater sucker fish in there. Anyways a week later I bought 2 guppies and 1 black molly and added them to the tank and been feeding them a little pinch in the morning and night. It’s been 2 days since having the fish and I bought nutritifin cycle and added it to the tank and will keep adding it weekly and when I do water change. I also bought a testing kid as well and so every 2 weeks. Is my fish going to be ok ?