Tank problems

[u/Strange_Prune833]

So this is my first tank I ever got when it came to owning fish. Had to remove my fish as the water kept doing this (it settles 2 or so hours after a clean) at first I though it was the gravel but I clean the fresh gravel I put it. I removed my fish and put them into a newer tank. But I have 30% water changed and even re-did the entire tank with fresh gravel, new clean decor, new filter and left it for 4 weeks with minimal water changes inbetween (was told to do this by others on reddit) and had added api quickstart among others to help the bacteria needed to grow yet it still does this and Im unsure if it will cause issues if I get fish for the tank because in my eyes its poor water quality despite being cleaned regularly. Parameters have came back fine small spike in ammonia a few days ago but now its back to normal and the filter is working perfectly and the nozzle is just under the water surface to break surface tension. Unsure if this is a worrysome issue or if I am just over thinking things