Have got a 1000mm x 500mm x 500mm tank about 53 gallon.
It was one of the Chinese made (I think) ones with the filter in the lid and integral twin light with spearate switches. £100 off rrp too in LFS sale!
I have put approx 3/4" of sharp grave, then 1 1/2 inch flourite with 3/4" of play sand at the top.
The bad news was I had to empty it a day after I filled it as the cloudiness was terrible.
The good news is it is now clear as a bell and however much you disturb the sand it is crystal clear again in minutes.
The Danios are absolutely loving it.
I would recommend sand anytime if compatible with the fish as it is so much easier to plant plants in - they actually stay in, especially my microvallis!
It was one of the Chinese made (I think) ones with the filter in the lid and integral twin light with spearate switches. £100 off rrp too in LFS sale!
I have put approx 3/4" of sharp grave, then 1 1/2 inch flourite with 3/4" of play sand at the top.
The bad news was I had to empty it a day after I filled it as the cloudiness was terrible.
The good news is it is now clear as a bell and however much you disturb the sand it is crystal clear again in minutes.
The Danios are absolutely loving it.
I would recommend sand anytime if compatible with the fish as it is so much easier to plant plants in - they actually stay in, especially my microvallis!