simple green
Member
Just wondering what we're doing here...
coco users only please
coco users only please
Do you guys have any issues with your PH rising? Do you have your airstone on 24/7 or just before you feed?
i hand water from the top with a beer cup. my 'res' is a pail with 2 gallons of mix in it. before i water, i scoop the nute mix out and pour it back in a few times. puts as much dissolved oxygen in it as bubbling but without the pump.
it doesn't have to be bubbling to be aerated. waterfalls work even better than bubbles.
the dissolved oxygen doesn't get into the water by the bubble going through the water in the bucket - it gets into the water when the bubble bursts on the surface. science - it works, bitches!
http://www.kywater.org/ww/ramp/rmalk.htm
Alkalinity refers to the capability of water to neutralize acid. This is really an expression of buffering capacity. A buffer is a solution to which an acid can be added without changing the concentration of available H+ ions (without changing the pH) appreciably. It essentially absorbs the excess H+ ions and protects the water body from fluctuations in pH. The presence of calcium carbonate or other compounds such as magnesium carbonate contribute carbonate ions to the buffering system. Alkalinity is often related to hardness because the main source of alkalinity is usually from carbonate rocks (limestone) which are mostly CaCO3. If CaCO3 actually accounts for most of the alkalinity, hardness in CaCO3 is equal to alkalinity. Since hard water contains metal carbonates (mostly CaCO3) it is high in alkalinity. Conversely, unless carbonate is associated with sodium or potassium which don't contribute to hardness, soft water usually has low alkalinity and little buffering capacity. So, generally, soft water is much more susceptible to fluctuations in pH from acid rains or acid contamination.
Methodology: Alkalinity is an electrometric measurement which is performed by the computer aided titrimeter (CAT) and the pH electrode. A potentiometric titration is taken to an end-point reading of pH 4.5. The amount of acid required to reach a pH of 4.5 is expressed in milliliters.
cont.