@hrishi007 - your expert advice always come handy
And yes i do keep a check for the algae factor with weekly WC
Weekly WC has minimum/nothing to do with Algae outbreak.
U will not understand this unless there is a scary algae outbreak.
Follow the below points to keep Algae at bay..
1)DO NOT go above 1 WPG lighting if CO2 is any less than 15ppm/fluctuating CO2 level or else its suicide.
2) As u have already used laterite in soil base, avoid any kind of chelated iron supplement at all costs...remember with correct co2 levels (30ppm) the iron level in free water(not in substrate) should not exceed 0.1ppm. If this happens virtually nothing can stop algae.
I see many people use chelated-iron supplement along other supplements. Chelated-Irons are designed only for plant nursery use where they use stone wools as plant growing medium. A soil base containing approx 25-30 grams of pure laterite can supply enough iron for a standard 3 feet tank for 3 years...period. Iron is best supplied through soil in roots of the plants. Any free irons in the water gets utilized by the algae if CO2 is less than 30 ppm. In Higher CO2 levels plants can better use the available nutrients than algae.
3) Free Iron(Fe2+) in waters is very less , but not less enough to stop algae. Iron in the chelated form release Fe2+/Fe3+ ions in water which is readily usable by Algae by a method known to be "photo-reduction" of Iron. In this case
Iron-EDTA/Iron-DOC=====>Fe2+ + OxidizedEDTA/DOC
for this to happen the light wavelengths more than 500nm is required which is generally the bluish/UV component of the Lights. Hence Best used
kelvin rating would be 5000-5500K, Max 6000K. In fact fresh water plants do good both in red/yellow and bluish components of light, and for a little drop at the bluish end it wont harm your plants much. Hence If your top layer of soil has enough iron, you better cover it up with sand if you do not want to drop the Kelvin ratings of t your lamps. Because Iron resides in chelated or in DOC forms in soil(ADA soils contain very less Fe Levels).
4) Also while doing WC water hardness needs to be controlled before adding water to the tank as Algae do better in hard water and gets a lead start before the plants actually gets set properly.
5) Introduce plants like Hydrilla which can drain out free iron from water pretty soon. Dont get scared, it wont make other plants iron deficient.
6) Regular trimming of the plants.
7) Definitely introduce SAEs and various algae eating shrimps for fine tuning of the Algae.
Weekly Water changes definitely helps to reduce N and P levels in the water, but these are also required for better plant growth. Only Iron is such a component , if can be restricted in free water , Algae can be wiped off completely. Actually only one or two limiting factors do not suppress algae for longer period of time, One needs to hit them hard from every possible algae growing parameters by cutting those down seamlessly.
** By following these rules if you can reduce algae upto untraceable limits do not forget to remove the SAEs , or else Your Java moss will be vanished within 2-3 days
@Sourav - Thanks for your inputs really appreciated "ll take your advice under consideration.
Cloudy water is due to re-scaping ... Every time i do WC it does tends to get cloudy as i use tap water but it settle down within a day or two
1) If the water is getting cloudy due to tap water , then your tap water contains fairly high MgCO3/FeCO3. Please use some sort of water conditioner
like API Tap water conditioner. Also it does mean every time u do supply fairly high dose of Iron to tank water....not so good
in fact there is a better solution ... try to get those big PVC drums ..may be of
150-200 litre capacity. Hold the water in the drum for a day or two, if you can hold for a week ..would be best. you will find all precipitates at the bottom. use the water from top :D
2) If the soil is getting disturbed during WC clouding the water try covering up the soil with news paper and slowly add the water. I can also share a good link from Oliver Knot's tutorial.
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