general hardness

Hello! I’ve had my tank about a year now so I’m relatively new to the hobby. In the past I’d only ever tested ammonia, PH, nitrite & nitrate but recently I decided to test KH & GH as I’ve had a couple of guppy deaths. I’ve read various articles but honestly I’m still none the wiser on what safe...

I've attached a photo of the kind of rock I have in my tank, would this affect the water hardness in any way? only other things I have in my tank is plants and a cave and some smooth pebbles. My water hardness is normally around 20. I've been trying to find a type of cory which will be suitable...

Hi Everyone I'm looking to build my empty nano (21 litre/5 gallon) into a potential shrimp tank. I'm looking to set up something simple so I can work on some core skills in the fish keeping world. I took a look at my local water provider and the stats they have on the water in my area. The...

I have Discus, silver dollar, swordtail, kuhli, betta, ram, goldfish, pleco, blackghost knifefish, Green knifefish, angelfish. The questions is which fish need soft/hard water and how do I softened or hardened water? My GH is 3 dGH KH is 3 dKH pH is 7.5.

I contacted my local water provider and recieved some information about our local water supply that I use for my fish tank.   I attached a small section of what they sent me.   Would someone help me understand what these values mean and how they apply to general hardness/alkalinity requirements...