How about tightly coiling the air line around a submersible heater? I wouldn't expect the air line to melt. Although this wouldn't solve the problem of cooling down the ballast, it would help heat the substrate! :) -----Original Message----- From: Aquatic Plants Digest [SMTP:Aquatic-Plants-Owner at actwin_com] Sent: Sunday, July 13, 1997 3:48 AM To: Aquatic-Plants at actwin_com Subject: Aquatic Plants Digest V2 #830 In a message dated 97-07-12 20:24:23 EDT, you write: << was just sitting around looking at my fish tank and thought of a way to do cheap substrate heating. How about taking some silicon air line and have that in the substrate, then hook up a small (really small) powerhead or something to circulate water, and wrap some of the air line around our so many flourcent light balasts. We would be able to heat the substrate and cool the balast at the same time! All this for a fraction of the cost of a substrate heating device. >> That sounds like a neat idea, but wouldn't the ballasts get hot enough to melt the silicone? ------------------------------
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