Re: Acid buffer
> You can raise KH with baking soda or calcium bicarbonate. The latter will
> also raise GH, I think.
Won't baking soda raise the pH too? I put some sodium bicarbonate into some
water (about 1 teaspoonsful into 1 cup water) and the pH shot up. Maybe it
won't be so bad if I just add a few teaspoonfuls to the tank (125 gal) & see
I also decide to tip the rest of my peat (about 1/4 of a 350 cubic inches bag)
into a bucket of hot tap water (350 ppm CaCO3, pH 8.2). After a day the pH
in the bucket was down to 6.6 and the GH < 1, KH = 8. I siphoned off the
tea colored liquid & added it to the tank & added more hot water to the bucket.
I'm hoping this will be a good way to increase KH also, but I'm wondering what
happened to the GH? will the CaCO3 leach out of the peat at any time?
Now, to change the subject:
> Also, does anyone here run a denitrator? (I think George does.) Any comments
> on how well it works and what effect it has on the plants?
Yes, I run a denitrator. It's a commercial one, Aquarium Products or some name
like that. It's basically a coil of black tubing & some bioballs inside a
large clear hard plastic cylinder. It runs almost constantly on the tank
except that my inlet for it is from a power head & the tube often comes out.
It definetely reduces nitrates. With it & a fish load of approx. 0.5 inches of
fish per gallon in a 125 gal heavily planted tank & 5 gal water changes per
week I maintain nitrates approx. 0 (sometimes gets up to 5 ppm if I get lazy
about gravel vacuuming). Effect on plants: very positive when they're not
being strangled by hair algae which was a major problem for me before I
decreased fish load & added denitrator & CO2.