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explosive growth, pH crash, what happened?
Hi,
i've had a planted tank for about 3 years now. over the past year, most of my plants died off (ozelot, crypts, etc), and the two remaining amazon swords were looking pretty wan, and i had expced it to completely die off leaving the tank just with anubius and java fern. since only the low-lights are doing well, I hadn't renewed the lights either, and only fertilized once in a blue moon (slow growth plants only) however, in the past 2 months, the almost-dying amazon started to revive itself, and basically went from a 4" puny, sad-looking plants to a 15" bushy, healthy plants. to support its unexplained growth, I have increased the fertilizer dosing. now the java ferns have leaves about 7inches long and 1.5in wide, and is growing like a weed too. I still don't understand what happened that caused the sword plants to experience such amazing revival. I have not done much in the tank (37G tall, 55W, fish, UGF, HOT Magnum) other than periodic water changes, and only increased fertilizing/excel after it became apparent that the swords were going through some sort of a revival. of course, this renewed growth caused a pH crash to 6.0 since my water change cycle was no longer frequent enough (my tank is very soft.. usually is like kH=2 or so.. now it's near zero. I guess the plants ate up all the minerals), so I'm in the middle of trying to stabilize it, but that's another story. does anyone have any clue what may have changed in the tank to cause this incredible change? linda |
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