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post #1 of 4 (permalink) Old 07-05-2007, 03:22 AM Thread Starter
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ph and co2

tank stats:
20H tank
46 w compact flouro
play sand and flourite substrate
6 zebra danio
mating pair of kribs
1 oto
amazon sword, vals, mondo grass, crypt. lutea, anubias nana, ludwiga, rotala, cabomba
problem is new DIY co2 has lowered ph to dangerous levels (6-6.5)
how can i raise it without using “ph up”?
kh is about 150ppm
gh is about 180ppm
are these numbers ok?
sorry i don,t have time to search cause i want to get things evened out right after work tomorrow...i just bought test strips today. no wonder my krib fry disappeared!! thanks
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post #2 of 4 (permalink) Old 07-05-2007, 04:06 AM
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dangerous levels? I wouldnt call that dangerous levels..Ive had my tank as low as 5.5ish-6.0ish with no ill effects to the fish. Tetras love low ph water. I typically keep mine 6.0-6.5ish with the co2...

I wouldnt worry about it...

Your krib fry were probably eaten...
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post #3 of 4 (permalink) Old 07-05-2007, 04:37 AM
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Why is a pH of 6-6.5 'dangerous levels'? Consistent pH is way more important than stable pH. 'pH up' and other chemicals of that nature tend to use phosphate buffers which kinda 'wear out' after a couple weeks. Test strips are notoriously known to be inaccurate. Liquid test kits are markedly more accurate. Your KH is 3deg, so you might want to a tablespoon of baking soda per 50gal water (I didn't see how many gal's the tank was) to help increase the KH.
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post #4 of 4 (permalink) Old 07-05-2007, 04:39 AM
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BTW, mondo grass is a marginal plant - meaning it's not able to sustain long periods of time fully submerged. It's not a true aquatic plant, and will eventually die and rot in your tank.
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