Help me with dosing - The Planted Tank Forum
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post #1 of 3 (permalink) Old 02-19-2010, 05:37 PM Thread Starter
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Help me with dosing

After reading and re-reading seemingly endless posts on dosing, I think my eyes have gone cross. I know this is supposed to be easy, but I need help with a place to start my dosing! I'm not sure if you would consider my lighting medium tech or what, and I have a highish fish load. Here's my setup:

* 29g (30" long)
* 2x24w T5-HO Nova Extreme lighting (6" above water using the legs, 9 hours per day)
* Black hood on top of tank blocks some light to parts of top front of water column
* Marineland Emperor 280 filter
* DIY CO2 (About 1-2 bps)
* DIY Hagen Mini Elite Diffuser (in the mail...)
* ECO-Complete substrate

* 1x 4-5" Gourami
* 1x 4-5" African Spotted Leaf Fish
* 1x 5" Angelfish
* 3x 1-3" Tiger Barbs
* 2x Otos
* 1x Rubber-lipped pleco
* 1x Upside-down catfish

Flora (estimated):
* Hornwort
* Anubias nana
* Anacharis
* Cryptocoryne parva
* 2x swords (not sure which)

Dry Ferts purchased from
* KH2PO4
* KNO3
* K2SO4
* CSM+B Plantex

Sooo, I need to get a decent dosing schedule to start with as I get to know my tank. Would my fish load be considered high enough to require less Nitrate dosing? I'm confused if my setup is considered medium-tech or if I can dose 1-2x a week instead of 3x with less water changes. I'm willing to start with the water changes each week if need be, but I'm not sure that I will be able to keep up with this. I have Chuck's calculator and it tells me to add like 3/4 tsp K2SO4 if I am to achieve near a target 20ppm K, but that's way higher than any suggested dosing I have seen!

How's this to start? I could be way off base, but that's why I'm posting!
1/16 tsp - KNO3
1/32 tsp - KH2PO4
3/4 tsp - K2SO4 (way too much?)
1/16 CSM+B Plantex

How often should I dose with my setup? 2x per week, alternating macros and CSM+B? Can I get away with water change every 2 weeks? Thx everyone!

Last edited by dmanno; 02-19-2010 at 05:40 PM. Reason: Added exposure time
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post #2 of 3 (permalink) Old 02-19-2010, 08:41 PM
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IMO you do have a high fish load and too much lighting for DIY CO2. Most people alternate macros with micros. That would be a lot of potassium too. More like 1/16 to start. Me thinks you're going to have some algae issues once you start dosing though. Raise the lighting to 12" and cut back to 7-8 hours. Just keep an eye on the plants/algae balance and go slow.

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post #3 of 3 (permalink) Old 02-21-2010, 08:59 PM Thread Starter
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I thought that the K2SO4 seemed way high even though the calculator tells me I need that much. Thank you for the reply.
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ferts, schedule

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