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Marc-
I'm not anthony so I'll keep my answer brief.
sorry to hear all your cultures are crashing, but phyto is relatively simple, in that they require, proper water, light and food, the reason they crash is becuz one of those needs are unmet. If the culture is reaching a good green coloration then crashing the next morning, then you might want to look at contanimation (like ciliates or bacteria), major ph swings in the cultures, or not enuf fertilizer.
can you attribute any of these problems to your culture? are you using unsterilized bottles, airline tubing, or water? what does you crashed cultured look like.
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Currently in between fish tanks
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