What is your alk, calcium and most importantly, magnesium.
In general, lps prefers higher alk in 9 to 10 dkh range, no idea why that is but just from observations. Magnesium is very important, if it is below 1200 ppm, hammers, touches and Frogspawn will not be very happy.
For a small tank like this, checking the parameters frequently is impotent.