Hi there, Firstly, we don't get Nilocg here... but we can get pretty much anything that is API/Seachem. When I first started our tanks, I used Osmocote plant tabs. They're due to be replaced soon. But as I've added a bunch more plants, I want to make sure that I cover everything as I think the nutrients are running low. Here are the two tanks. Should I stick with the tabs and use various API/Seachem liquid ferts to top up? Or can someone recommend a liquid fert combo that I should get to keep them going? Remember...needs to be available in Australia. Thanks.