Soooo....here in Australia we are in the middle of spring and earlier in the season my big wattle tree which is close-ish to my pond bloomed...and all the lovely yellow flowers fell into my pond...and now its all sunk to the bottom. Since I don't have a skimmer or a drain (sigh) I will have to jump in next weekend and remove all the sludge and whatnot at the bottom of my pond (and probably plant some more water plants in too. I managed to 'borrow' some pH strips from a lab where I 'do things' and the pH read somewhere between 6.0 - 6.5. Should I just mix in some baking soda to get it back up a bit? I estimate that I have about 2500 gallons of water (thx google xD). Probably test the pH again tomorrow. Any idea how much baking soda I should put in?