My tank looks better w/o changing water?? - The Planted Tank Forum
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post #1 of 3 (permalink) Old 08-04-2006, 09:17 PM Thread Starter
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My tank looks better w/o changing water??

So I used to do weekly water changes and finally after experiencing repeated diatom blooms, I've left the tank from full to the brim to having evaporated an inch below the trim or so (tank dimensions 18" high, 20" long, and 10.5" depth). I started this as sort of an experiment. It has been approx. 3 weeks, and in that time my tank has dramatically grown and most of the diatoms have gone away. The water has stayed very clear and doesn't smell (not using chemical or bio filtration, only physical). I haven't tested the parameters yet, but I was wondering if anyone else has experienced anything like this - your tank clearing up by just leaving it alone. I haven't cleaned the filter cartridge, or anything in the tank for that matter, except for using the mag-float on the glass. I feed the fish once daily. So far I'm kind of confused, I'm guessing our tap water here is high in silicates (may call Tucson water)... May I add the fish are happier than ever - not showing any signs of stress. I've added 1/4 tsp KNO3 and 1/16-1/32 tsp of K2SO4 and KH2PO4 in the last 3 weeks - I usually do this weekly. Could the Arciliite or Zeolite (my substrate is designed for ponds) be helping? I hear it absorbs ammonia and nitrates....
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post #2 of 3 (permalink) Old 08-04-2006, 09:25 PM
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I've never done my small, 20% water changes more frequently than every third or fourth week, and its worked out just fine for me. This applies to past fish-only tanks as well as the planted tank I have now.

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post #3 of 3 (permalink) Old 08-04-2006, 09:54 PM
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No water change filtration

I have had fish tanks for years and rarely do water changes. The only water changes I typically do are when cleaning the substate or adding water do to evaporation. My fish are healthy and don't show signs of stress. So, my vote would be to keep the hobby low maintenance as long as things look good.
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