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Message: [QUOTE="combatwombat, post: 528937, member: 14119"] Alright, here we go. Initial readings this evening: [TABLE] [TR] [TD][B]PH[/B][/TD] [TD][B]KH[/B][/TD] [TD][B]Ammonia[/B][/TD] [TD][B]Nitrite[/B][/TD] [TD][B]Nitrate[/B][/TD] [/TR] [TR] [TD]8.4[/TD] [TD]130[/TD] [TD]0.25[/TD] [TD]0[/TD] [TD]0[/TD] [/TR] [/TABLE] [B]Notes:[/B] [LIST=1] [*]This is the first time I've EVER measured above 0 on ammonia. Wonder if this is temporary rise from algae removal and stirring up sediment earlier today? Will test again in the morning. [*]My first reading of KH (w/ hot tub test strips) was 40-60 ppm and I've added 15 lbs of sodium bicarbonate (baking soda) since. This KH reading is from the Sera KH reagent-based test performed at 2x resolution (10 mL of water instead of 5). [/LIST] I estimate my water volume at 8-9000 gallons. My understanding of measuring water volume with baking soda is this: [LIST=1] [*]1 lb of baking soda will raise the KH of 1,000 gallons of water by 71 ppm. [*]The more you raise KH, the more accurate the volume measurement will be. [/LIST] I'm currently sitting at 130ppm KH. If I assume a volume of 9,000 gal and add 27 lbs. of baking soda, then I will expect to see a rise of 213ppm to 343. That is quite high, but I don't have anything I care about besides plants living in the pond right now, so let's have at it. I will add 27 lbs of baking soda now and measure KH again around this time tomorrow. Based on the final reading, I will use the volume measurement to determine the dose of hydrogen peroxide (h2o2) to kill off the remaining algae (and approx. 1 metric ton of parasite carrying snails). Over and out. [/QUOTE]

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