Tam 1 Report post Posted September 9, 2019 Hi Toga, A) Is the drain located in the centre ? Yes, in the centre of growbedB) Do you have a stand pipe / strainer raising a little from the bottom ? If so, How high is it from bottom ? No, I don't have stand pipeC) Can you describe in a little more detail how you made / setup the standpipe / strainer and/or how you prevent the sand from draining into the fish tank ? I use plastic membrance as picture in bottom and next is biger sand - gravel. I don't size of gravel, about 5 kg each tank, and next is my sand Quote Share this post Link to post Share on other sites
Tam 1 Report post Posted September 9, 2019 Hi Toga, A) Instead of only 1 hose outlet pumping into grow bed, perhaps increase this to 3 or 4 outlets. I will open outlet wider, it have valve for I adjust water flowC) Instead of 6 minute pump cycles, increase this to 20mins On / 60mins Off... or more. I will increase the cycles to 20 mins on/ 60 mins off , 10 times / day D) Keep fish feeding to a minimum whilst mortality continue. I already decrease feeding. I make all test for all three tank, please open my attach file Couple of picture for my mortarily Thank Tam Monitoring LH model A.xlsx Quote Share this post Link to post Share on other sites
Toga 179 Report post Posted September 13, 2019 Hi Tam, I assume you put a ball valve on because the water was stirring up the sand on top to much ? So you turn it down a little ? I note you also put some material on top of sand to prevent it stirring up. The water flow needs to be maximum. Open the valve completely. If you put a "T" piece on the outlet hose it will: a) Minimise sand disturbance b) Divert the water into 2 directions c) Push the water across the sand (Not down into it) d) Even water flow through a maximum surface area I am not familiar with that test kit brand. Do you have a friend with his own test kits ? It would be advisable to do some tests using a different kit. Test liquids can become inaccurate as they age. The same brand is OK... we are looking to check the accuracy of the results your kit. Cheers Toga Quote Share this post Link to post Share on other sites