The Planted Tank Forum - View Single Post - diatom if it won't rub off?
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post #1 of (permalink) Old 01-29-2013, 12:50 AM Thread Starter
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diatom if it won't rub off?

I've had this tank up since mid November - and have read about diatom in new tanks. However, everything I read says it will rub off - and this won't. I just did a water change yesterday, and clipped off an affected leaf. I took a scratcher used on inside tank glass to it, and it will not come off. It looks like it is seriously affecting the plant leaves.

I am wondering if it is not diatom, can it be very hard water, PH 8, or that there is to much light?

Here are my stats - tried to include everything.

Thanks for any advice!

•startup November 2012 - 15 gallon - no CO2
•24" T5 HO - 2 bulbs: Stock 6000k and swapped the 650nm stock bulb for a 10,000k full spectrum. Lights are 12" from substrate.
•AquaClear 20 with sponge, Biomax, carbon and a second AquaClear 20 with sponge, Biomax and Purigen. Both set on low flow setting.
•Deep Blue Heat Stik 100 watt - temp steady at 77 degrees
•Substrate 2/3 Eco Complete, 1/3 black gravel
•Flourish, Flourish Trace, twice a week at bottle recommended rates. Just got Flourish potassium so it's only been dosed once. Flourish Excel at half the bottle rate twice a week
•using well water. PH 8.0, hard to very hard - 26 drops to get color change on API kit (not sure how to convert drops to KH/GH
•I use API Freshwater test kit, and numbers have been very steady. 0 ammonia, 0 nitrite, 5 -10 nitrate.
•Been doing approx. 40-50% water change every week to 10 days.
•Hornwort, Cryptocoryne wendtii sp 'Green Gecko', Java Fern, Anubias Nana, Windelov Java Fern, Hygrophila 'Sunset', Brazilian Pennywort, Hygrophila difformis, Bacopa australis, Creeping Jenny, Italian Leopard Vals, Egeria najas, narrow leaf Egeria, Hygrophila sp 'Bold', Hygrophila sp 'Tiger', Aponogeton Crispus, Crypt Wendtii Bronze, phyllanthrus fluitans - red root floater, Lobelia Cardinalis, Lindernia Rotundafolia varigated, nymphoides sp. Taiwan, Slavinia minima, Dwarf Water lettuce
•6 neon tetras, 2 male Endlers, 4 pygmy cory, several cherry shrimp, some pond snails and 2 red onion nerite snails.
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Last edited by daylily; 03-24-2013 at 04:01 PM.
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