Sand problem

[pepster86]

I recently noticed that I am getting green color on the surface of my sand bed. After mixing it up it disappears but reappears daily. I have my lights on from 12-7pm. Is this too much light with 300 watt metal halideon a 70 gallon tank? I also have a small diamond goby. My original disappeared never to found. I suspect he became a victim in his cave. In addition,

 

[spiderwoman]

What is your flow and flow pattern? Most likely you don't have enough flow especially pointed towards the bottom. Also how old are your bulbs?

 

[pepster86]

Good point- I had a rotating pump but recently it stop rotating. This is a tank that is 1 year old. I guess bad water flow allows substance to build up? Any other suggestions. I appreciate the help

 

[fishfreak1242]

In addition to the flow you should get a bigger cleanup crew. If you get 10-15 nassarius snails they will take care of your sand bed problems.

 

[michaeltx]

increased flow should help.
what are your water parameters for algae to grow that fast to re-appear daily somthing is out of balance IMO>
Mike

 

[perfectdark]

Suck it out.. does it smell like rotten eggs? There might be something else contributing.