Today I was planning on changing out the BDBS for pool filter sand until I ran tests for ph, ammonia, etc. The tests where very surprising and pleasing at the same time. ph 7.6 (same as water source), ammonia 0.5, nitrite 0, nitrates 5.
The cycle is almost finished and this is surprising because on Nov. 26, 2020 I tested ammonia to be off the chart calling it an 8+. I did a 70% water change, tested ammonia to be 4+. So I left it alone not doing anything to it until today Dec. 5, 2020 nine days.
Since my experience with my aquasoil cycling in my 55 gallon tank, I knew that the soil is an ammonia factory. So thinking after changing the water to get the ammonia down to 4 it would just shoot right back up again. But since I didn't test it again, I was not really sure if the ammonia did spike again. Anyway instead of the high spiking ammonia stalling the cycle, it cycled despite of it.
And that is strange because I have always heard on this forum and other forms that ammonia over 3 to 4 would stall a cycle.
So I have decided for now not to mess it all up with a major substrate change, I mean it might not hurt anything, but why take the chance when this tank is almost cycled. Worse comes to shove I can always get fake silk plants until live plants can grow large enough.
I want to make this a tetra and shrimp tank, starting with re-homing my red eyed tetras form the 55 gallon tank. The Angel fish in that tank are being aggressive to the tetras and have already killed one, that should leave me nine more.