I agree with Lotus. I have soft acidic water with a low pH of about 6.0 (I've stopped testing for pH.) I have read that it is really the change in pH that affects the fish, rather than a constant low or high pH. I have stopped adjusting the pH and my fish have been fine. I also have fish that prefer soft acidic water, which may also be a factor. Not sure if this philosophy would work if you had African cichlids.
__________________ BritishBookBug
Planted tanks: 10 gal: 2 German Blue Rams, and 1 otto and fry
29 gal: 1 angel fish, 1 flying fox, 2 ottos, 10 neon tetras, and 4 harlequin rasboras, and 2 emerald cories.
46 gal: 2 bronze cories, 1 pleco, 2 severum, and 3 firemouths, 2 ottos, 1 flying fox
70 gal: 2 blue gouramis, 2 bala sharks, 4 black skirt tetras, 3 swordtail, 4 bloodfin tetra, and 4 silver dollars, 1 pleco, 2 flying foxes, and 2 ottos.  |