Solcielo lawrencia;114761 said:Just FYI, 5lbs of magnesium sulfate can be bought at Safeway for $4.
You also need a phosphate source: Monopotassium phosphate (KH2PO4).
Maybe a calcium source if you have soft water: calcium sulfate (CaSO4).
You may need trace elements like CSM+B.
It would be easier to understand what's going on if you take the time to explain what amount of fertilizer you are dosing, the dimensions of your tank, the lights you are using, some of the plants you have questions about, etc.reef12;115043 said:Thanks , but algae going crazy now.
Tug;115044 said:Hi Jeff,
Most any drugstore will carry Magnesium sulfate as Epsom salt.
http://gardening.about.com/od/organicgardenin1/f/Epsom_Salts.htm
Are you still dosing Excel?
Flourish Excel Alternatives;
http://www.barrreport.com/showthread.php/7153-flourish-Excel-Alternatives
It would be easier to understand what's going on if you take the time to explain what amount of fertilizer you are dosing, the dimensions of your tank, the lights you are using, some of the plants you have questions about, etc.
reef12;115794 said:Sorry for the late come back but yes just started again, and have a 2 liter bottle coming , so should last awhile, as will be cutting back soon, trying to kill off the Black beard Algae.
Thanks for the heads up but seems a lot of trouble , with the mixing and all.
Using the Tank size chart, 125 Gallon, 380 watts of VHO 10,000 K bulbs and just added 6 3 Watt LED's which put out a bunch of light will add 6 more to fill in one corner soon. All done by me and I did order a Dimmer so good there as can cut back on them when done I want to replace all bulbs to LED's
I dose a tad over two Teaspoons a day of Dry fert's Macro Micro mix from the Fert store and I just started adding a tad more of Potassium as I have noticed holes in leaves and I hooked up co2 about two weeks ago 1 Bubble a second, for now.
Tug;115824 said:If you are talking about taking the trouble to mix one of the Excel alternatives, you just dose half the recommended Excel dose.
They are ruffly twice the strength of Excel.
Sounds as if your using your reef lights. The watts per gallon rule isn't very helpful. It has more to do with the distance the light travels from the source to the substrate. You will need to hang those lights in the next room. The 10,000 K bulbs might not be of much use. I'm not an expert but 10,000 k falls outside the PAR used by plants for photosynthesis. You might want to ask around for some lighting options and read Hoppy's article, Lighting an Aquarium with PAR instead of Watts - http://www.plantedtank.net/forums/showthread.php?t=184368
The LED build you are talking about sounds great. You should start a thread on the build. I'm sure others will find it interesting. You might even find some helpful suggestions. My concern would be, combining the LED's with the VHO. You would be wise to start a topic on light and another topic on CO2.
This is what I do know, what you think is K+ deficiency is more likely CO2 and PO4 related. Try adding some Mono Potassium Phosphate (KH2PO4) and dose 0.4 grams/daily. That's about a rounded 1/16 teaspoon a day. The 2 teaspoons of MMMix should be fine dosed daily and the mix provides more then enough Potassium. You should not need to add any additional K+ when using the MMMix. I just don't get the appeal of the MMMix when all of the ingredients in it are available separately. IMHO, MMMix is better suited to PMDD. :subdued: