i have a 150w metal halide 20000k in addition 1 actinic 40w VHO in addition to 1 40W 14000k VHO.?

Question

my tank is a 60 gallon reef tank and with that capicity of light needed for the growth of anemones and corals algae is growing fast on the glass and on the sand i dont mind it on the rocks but on the glass and the sand its too ugly. how can i get rid of this problem i have an in sump tunze 500L skimmer in addition to 1 eheim mechanical filter up to 300L and also 1 wetdry filter up to 350L.metal halide is on between 6-8 hrs daily .

Answer 1

In addition to the previous answer. Make sure and rinse filter media in your Eheim and WD regularly as these filters can become nitrate factories. Often aquarists ignore the rinsing media in these two filters due to there large bio capacity, however this can result in higher nitrates. Cleaning sponges and other filter media on a regular basis is a must to prevent this. One more thought on your wet dry in particular, I usually substitute cured live rock crumbles (about 1-2") in place of bio balls, I usually have lower nitrates this way due to more de-nitrification.
Try and keep your nitrates under 20 ppm and your phosphates as close to 0 as possible.

I also recommend vacuuming sand on a regular basis however only push the nozzle about 1/2 to 1" into the gravel to avoid disturbing anaerobic bacteria.

Also consider your food, if your food is high in ash, it probably is high in phosphates which passes right on through the fish. When feeding dry foods, try and use a product high in aquatic ingredients such as Spirulina and Whole fish meal (vs. regular fish meal which is just left over fish parts from human processing).

This article will discuss more about aquarium filtration, including wet dry and canister filter:

http://www.americanaquariumproducts.com/Aquarium_Filtration.html

Answer 2

I think the W/D filter (and maybe the Eheim,too) is producing too much Nitrate. If this is your problem,then the answer is more frequent water changes to bring down the Nitrate levels. It's also possible that you have a high Phosphate problem,and again water changes are the solution,along with those filter pads sold strictly for the reduction of Phosphates. Do some testing,and perhaps consider reducing the photo-period,if it's longer than10 hours.

Answer 3

what kind of algae is it?

If it's coraline, nitrate actually inhibits coraline algae growth, as will phosphate.

How old is the tank? Almost everyone goes through an algae bloom for around 3-6 months before the other organisms start to compete with it and your water parameters even out.

Answer 4

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