Join Date: Mar 2013
Location: washington dc/switzerland
Mold in emersed setup
I am growing mainly crypts in a two-level emersed set up. Mold is rampant. White on gravel in upper level (above water level) and gray with spots on water in lower level. All in a 55 gallon hexagonal aquarium. Plants were booming initially. Since my well water has very high copper content -- deadly for crypts -- I used rainwater. Unfortunately, I initially used rainwater overflow from the house gutters. I strongly suspect that that was the source of the mold. (I had been growing the crypts earlier in plastic storage containers with city water in another location.) Is there any chemical I can use to kill the mold without damaging the plants? (Fungicide had no effect on the mold.) I fear that removing all the plants, flushing the tank with the copper-laden well water, draining that water, then somehow getting enough rainwater to flush after the well water will not defeat the mold, enough of which will probably survive to repopulate the setup. I know the mold thrives on excess moisture, but it looks to be so well established that even the minimum moisture necessary for the plants would not dent it. Of course, I could remove everything, sterilize the tank with bleach, and start over, but that's a daunting task at my age. Any suggestions most welcome.