Vin Swords
Fishaholic
It's not cycling problem.. Can't be water either.. So have a wild guess..
New tank? Not cycled? Setup your 150l+ tank.. Add hand full of gravel from LFS tank. And add two or three danios. Don't change the water for month. Then do 50% wc and remove danios and add fish of your choice. (slowly) . That's it.
Ps.. I keep large and rare fish for 20+ years, but never seen a test Kit.
New tank? Not cycled? Setup your 150l+ tank.. Add hand full of gravel from LFS tank. And add two or three danios. Don't change the water for month. Then do 50% wc and remove danios and add fish of your choice. (slowly) . That's it.
Ps.. I keep large and rare fish for 20+ years, but never seen a test Kit.