My Mint Charlie has been getting very brownish colored leaves and stems over this past week. I use Flourish Comp. Supplement & I got 1.5WPG(20 gal-30wts). Is it b/c I am due for a water change? I haven't done one in about 2 weeks? There's only a 4 month old guppy but it poops a lot & I had snails for about a month but I removed them all since they contributed to the bioload. Any suggestions?
